NMR-262 Repair Instructions
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Back Door Gasket
Compressor
Adding Oil to the Compressor
Compressor Oil Sight Glass
Compressor Service Valves
Condenser Coil Cleanliness
Condenser Coil Replacement
Condenser Fan Motor
Contactors
Container Air Leakage
Discharge Pressure Regulator –
Adjusting
Discharge Access Valve – Opening
Evaporator Fan Motor
Evaporator Air Louvers
Evaporator Inner Door Gasket
Evaporator Outer Door Gasket
NMR-262 Repair Instructions
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Filter Dryer and Moisture Indicator
High Pressure Switch
Hot Gas Solenoid
Liquid Line Moisture Indicator & Filter Dryer
Manifold Gauge Set
Mega-Ohm Testing
Non-Condensable Gases – Removal
Quick Probe Replacement
Receiver
Refrigerant Leak Testing
Suction Pressure Regulator - Adjusting
Suction Access Valve – Opening
Superheat
Thermostat Labels
Touchpad
TXV Power Head Replacement
Engine Control Unit
Back Door Gasket
The rear gaskets should be sprayed
with a lubricating agent as needed to
ensure they open and close without
problems.
Compressor
Turn off main power to Reefer Unit.
Swing control box open to gain access to compressor area.
Hold control box in open position with a bungee strap.
Evacuate refrigerant from the system (Follow Proper Procedure).
Remove gauges after evacuation is complete.
Disconnect the suction and discharge service valve assemblies from the
compressor.
Open junction box on top of compressor. Disconnect all wires and record
how they are wired for easier reconnection.
Unscrew cable gland from junction box and remove.
Dismount the control box latch located at the bottom of the frame.
Remove the four bolts that are mounting the compressor to the frame.
Compressor (Continued)
It is recommended to place wood blocks under the compressor and between
the rails to help to easily slide the compressor out. When sliding out try to
remove at an angle for easier removal.
Get new compressor moved into place.
Install four bolts mounting the compressor to the frame.
Install cable gland and rewire the compressor.
Close junction box.
Pressurize system to check for leaks (Follow Pressure Check Procedure).
Vacuum System (Follow Vacuum Procedure).
Recharge system with refrigerant (Follow Recharge Procedure).
Test unit to confirm successful replacement.
Adding Oil to the Compressor
Connect manifold gauges.
Connect oil to the suction
service valve.
Connect pump to discharge
service valve.
Open high side manifold
gauge.
Close low side manifold gauge
Turn pump on.
Back seat both service valves
Allow pump to pull oil into
compressor.
Compressor Oil Sight Glass
During normal
operation sight glass
should be ¼ to ¾ full
of Oil
System must run for
20 minutes prior to
checking oil level
Compressor Service Valves
Open to the system - with access to the service connection!
Compressor Service Valves (Continued)
Flow from the compressor
to the Suction or Discharge
line is stopped
Closed to the system - with Compressor Pressure
access to the service connection!
Condenser Coil Cleanliness
It has been noticed by Klinge Corporation that proper coil
cleaning is not being performed on the condenser coils.
Proper cleaning would help to increase the life of the coil
fins and the overall performance of the unit.
It is recommended that the condenser coils are washed
on a quarterly basis.
The proper procedure for cleaning the coils is to use an
environmentally safe acid coil cleaner and a power
washer.
If water is not available then it is acceptable to us a high
pressure air system (Nitrogen) to blow the dirt from the
coils.
NOTE: It is also recommended that the Generator Set
radiator is washed twice per year.
Condenser Coil Replacement
Remove Reefer Unit from
container.
Remove coil guard.
Evacuate refrigerant from
both systems (Follow
Proper Procedure).
Condenser Coil Replacement (Continued)
Unbraze lower piping joints.
Unbraze upper piping joints.
Remove condenser grill.
Condenser Coil Replacement (Continued)
Remove rear retainer
bolts located in the rear of
the condensing section.
Remove rear retainer clip
located in the rear of the
condensing section.
Condenser Coil Replacement (Continued)
Remove coil cable guides
located towards the top
rear of the coil.
Condenser Coil Replacement (Continued)
Install new filter dryer/sight
glass assembly (follow
proper procedure).
Install new coil from rear of
unit.
Install coil cable guides on
top of coil.
Reinstall rear retainer bolts
and clip.
Condenser Coil Replacement (Continued)
Braze the lower and upper piping joints.
Pressurize system to check for leaks (Follow Pressure Check
Procedure).
Vacuum System (Follow Vacuum Procedure).
Recharge system with refrigerant (Follow Recharge Procedure).
Reinstall front coil guards.
Reinstall condenser grill.
Remount Reefer Unit to the container.
Condenser Fan Motor
Turn off main power to
Reefer Unit.
Remove the condenser grill.
Open junction box on the
condenser motor.
Disconnect the main power
line wires (L1, L2, L3, L11,
L12, L13 ).
Unscrew the cable gland
connectors from the junction
box.
Condenser Fan Motor (Continued)
Unbolt the motor from the
pedestal base.
Slide motor out of
condensing section. Make
sure you do not cause and
damage to the condenser
coils.
When the old motor has
been removed try to remove
the fan blade with a fan
blade puller or you will need
to install a new blade on the
new motor.
Condenser Fan Motor (Continued)
Install new motor and fan back into the condenser section, ensuring
not to damage the coils.
Bolt the motor to the pedestal.
Spin the fan blade by hand to ensure that the blade does not hit the
shroud. If it does adjust the motor on the pedestal base.
Reattach the cable glands and wires in the junction box.
Turn the main power to the Reefer Unit back on.
Turn the reefer unit on, as soon as the motor starts shut the unit off.
Watch the fan blade to make sure it is spinning in the correct rotation.
If the rotation is incorrect you will need to change the L1 and L3 wires.
Recheck the rotation.
Close the junction box and bolt shut.
Reattach the condenser grill.
Contactors
Turn off main power to Reefer Unit.
Unscrew all wires from the contactor.
Release the old contactor from the DIN Rail by using
a flat blade screw driver to activate the release clip.
Clip new contactor onto the DIN Rail.
Connect all wires and ensure all connections are
tight.
Container Air Leakage
If you are noticing a large amount ice building
up on the evaporator coil this is mainly caused
by air leakage.
Make sure that when entering the container the
unit is turned off to minimize the pulling in of
warm humid air.
If the doors are not being opened and there is
still air leakage happening it is recommended
that the container be smoke bombed to find the
air leaks.
Opening the Discharge Access Valve
Remove Valve Cap
Turn CCW with wrench
to back seat
Adjusting Discharge Pressure Regulating Valve
Remove Cap to
Adjust Valve
Schrader Valve
Adjusting Discharge Pressure Regulating Valve (Continued)
Unit must be on defrost for
adjustment of setting
Proper setting for R404a is ~
240 to 270 psig
Use 5/16 inch Allen wrench to
adjust
CW rotation increases
pressure, CCW decreases
pressure
Replace cap after adjustment
Evaporator Air Louvers
Turn off main power to Reefer Unit.
Open Evaporator Door. Use to door
prop in the evaporator deck to keep
the door opened.
Reach arm in through the
evaporator fan blade and press in
the middle of the louver. This will
cause the louver to bend enough
that you can pull one side out of
the retaining bracket.
Louver
When you install a new louver
install one side of the louver in the
bracket and then bend in order to
get the other pin installed.
Evaporator Fan Motor
Turn off main power to
Reefer Unit.
Open Evaporator Door.
Use door prop in the
evaporator deck to keep
the door opened.
Evaporator Fan Motor (Continued)
Open junction box on the
evaporator motor.
Disconnect the main
power line wires (L1, L2,
L3).
Unscrew the cable gland
connector from the
junction box.
Unbolt the motor from the
pedestal base.
Evaporator Fan Motor (Continued)
Slide motor out of evaporator
box with care.
Make sure you do not cause
and damage to any of the
refrigeration piping.
When the old motor has been
removed try to remove the
fan blade with a fan blade
puller or you will need to
install a new blade on the new
motor.
Evaporator Fan Motor (Continued)
Install new motor and fan
back into the evaporator
section, ensuring not to
damage any piping.
Bolt the motor to the
pedestal.
Spin the fan blade by hand to
ensure that the blade does not
hit the shroud. If it does
adjust the motor on the
pedestal base.
Evaporator Fan Motor (Continued)
Reattach the cable gland and wires in the junction box.
Turn the main power to the Reefer Unit back on.
Turn the reefer unit on, as soon as the motor starts shut the
unit off. Watch the fan blade to make sure it is spinning in
the correct rotation.
If the rotation is incorrect you will need to change the L1 and
L3 wires.
Recheck the rotation.
Close the junction box and bolt shut.
Evaporator Inner Door Gasket
Open evaporator door. Use to
door prop in the evaporator deck
to keep the door opened.
Remove the old door gasket from
the inner door jam making sure
to remove as much of the old
material as possible.
Inner Evaporator
Door Gasket
Install the new gasket material.
You will need to apply contact
cement or another type of
adhesive since this gasket does
not have an adhesive backing.
Evaporator Outer Door Gasket
Open evaporator door. Use to door
prop in the evaporator deck to keep
the door opened.
Remove the old door gasket from the
door making sure to remove as much
of the old material as possible.
Install the new gasket material which
has an adhesive back.
Evaporator
Door
Since the gasket is not a one piece
formed gasket you need to start at the
bottom of the door with the gasket.
Then the bottom of the door is where
the two ends of the gasket will meet
which will help to prevent water from
getting past the gasket.
Evaporator
Gasket
Be sure not to kink the material
around the corners, this will cause a
bad seal resulting in air leakage.
Filter Dryer and Moisture Indicator
Screw in hand valve on receiver
to stop the flow of refrigerant
from the receiver.
Hook gauges up to the suction
and discharge service ports.
Start the unit and monitor that
the suction side goes into a
vacuum and then turn the unit
off.
Moisture
Indicator
Filter Dryer
Loosen the flare nuts on both
sides of the filter dryer and
moisture indicator assembly.
Filter Dryer and Moisture Indicator (Continued)
Reinstall the new filter drier and moisture
indicator assembly. Make sure to use oil on
the flare threads to help seal easier.
Vacuum out the suction side of the system
to a 30” vacuum and let stand with gauge
turned to off to assure the flares do not
leak.
Open the receive hand valve to pressurize
the system.
High Pressure Switch (NMR-262-20 and Older)
Note: For model NMR-262-20 and older.
Remove junction box cover on top of the
compressor.
Unwire the pressure switch wires 29 and
X2.
Install gauges on suction and discharge
service valves.
Screw both service valves shut by
turning the stems shut, which is the
whole way in till the stem is short.
Reclaim refrigerant from the compressor
(Follow Proper Procedure).
High Pressure Switch (NMR-262-20 and Older)
Unscrew the pressure switch off of the 90
degree elbow on the head of the compressor.
Install the new switch and then put the
compressor on vacuum.
While the compressor is on vacuum wire in
the new switch to 29 and X2.
NOTE: The newer units have a Schrader
Stem in the elbows, evacuation will not be
necessary on these units. New elbows can be
purchased for the older units.
Make sure there are three total wires
connected to X2. X2 Wire (White), High
Pressure Switch (Black), Solenoid Coil
(Orange).
Turn off the gauges and open both of the
service valves.
High Pressure Switch (NMR-262-22)
NOTE: For model NMR-262-22 only.
Remove junction box cover on top of the
compressor.
Unwire the pressure switch wires 29 and X2.
Unscrew the pressure switch off of the 90
degree elbow on the head of the
compressor.
Install the new switch.
Make sure there are three total wires
connected to X2. X2 Wire (White), High
Pressure Switch (Black), Solenoid Coil
(Orange).
Hot Gas Solenoid
Turn off main power to
Reefer Unit.
Remove junction box cover
on top of the compressor.
Cut the orange wires loose
from 19 and X2.
Remove the cable gland from
the junction box.
Remove the screw from the
top of the solenoid valve.
Hot Gas Solenoid (Continued)
Slide the solenoid coil off the
top of the valve stem.
Slide the new solenoid coil
on the valve stem and attach
the bolt.
Wire the new wires with the
existing 19 and X2.
Make sure there are three
total wires connected to X2.
X2 Wire (White), High
Pressure Switch (Black),
Solenoid Coil (Orange).
Liquid Line Moisture Indicator & Filter Dryer
Check for moisture in
system
Observe color in sight glass.
If yellow replace filter dryer
and recycle the refrigerant.
Run for 12 hours or until
sight glass is green, and
look for leaks on the suction
side.
If not green after 12 hours,
replace filter dryer, recycle
and look for leaks again.
Manifold Gauge Sets (MGS)
Low Side Gauge Compound Gauge
High Side
Gauge
Low Side
Hose
Utility
Hose
High Side
Hose
MGS - Compound Gauge
Positive
Pressure Scale
Built-in PT
Charts
Adjustment
Screw
Vacuum Scale
(Reference
Only!)
MGS - Frontseated
Each Gauge is isolated to it’s Hose!
Low Side
Hand Valve
High Side
Hand Valve
MGS – Low Side Backseated
Low Side
Hand Valve
High Side
Hand Valve
MGS – High Side Backseated
High Side Gauge and Utility Hose open to High Side!
Low Side
Hand
Valve
High Side
Hand
Valve
Purging a MGS
If MGS is new, was exposed to atmosphere or used
on a different refrigerant, you must purge them!
Remove Compressor Service Valve Stem Caps and
insure valves are fully backseated.
Remove Access Port Caps.
Install High Side Hose and Low Side Hose.
Purging a MGS
Do Not Connect the Utility Hoses.
Backseat the high side MGS hand valve. Leave low
side MGS hand valve frontseated.
Open Discharge Service Valve - 1/4 turn.
Use purge fitting to purge contaminants from utility
hose.
Frontseat high side MGS hand valve.
Repeat process for low side.
Installation of MGS
Remove Compressor Service Valve Stem Caps and
insure valves are fully backseated.
Remove Access Port Caps.
Frontseat MGS hand valves.
Install High Side Hose.
If MGS has positive pressure and was used for the
same refrigerant, purging is not necessary.
Installation of MGS
Install Low Side Hose.
Connect Utility Hose to MGS dummy port.
Midseat Discharge Service Valve - 1/4 turn
Midseat Suction Service Valve - 1-2 turns.
Gauges are now installed and ready for checking
system pressures!
Removal of MGS
With the unit operating.
– Backseat the Discharge Service Valve.
– Midseat the MGS Hand Valves.
– Let the pressure in the MGS stabilize to
Suction Pressure.
– Frontseat the MGS Hand Valves.
– Backseat the Suction Service Valve.
– Remove Hoses.
Low Side Pump-down
Purpose
To perform general service on the Filter-drier, Modulation Valve, Suction
Solenoid Valve, Heat Exchanger and TXV Valve.
Procedure
Install Manifold Gauge Set.
Operate unit in Cool Mode for 15 - 20 minutes.
Close the Liquid Line Hand Valve.
Monitor the Low Side Gauge and shut unit OFF when it reaches a slight
vacuum (5” hg max.).
Monitor the Low side gauge:
• Pressure rises above 2-3 PSIG - pump down again!
• Pressure does not rise above 2-3 PSIG - continue!
Front-seat the Suction Service Valve.
All Refrigerant is now trapped in the Condenser and the Receiver tank!
Manifold Gauges hooked up to Monitor Refrigerant Pressures
Refrigerant Charging with Manifold Gauges
Cylinder Valve
R404a refrigerant
cylinder
You can
now
service:
Mega-Ohm Testing
Purpose: test motor insulation with high Voltage DC
– A Go-No-go proof test of motor insulation
– Megger will produce voltage pulse and indicate pass or fail
– Used to check compressor and fan motors
Three basic types: Hand crank, line operated and battery
Test Voltage:
– Device rating up to 100 Vac – test voltage is 100 to 250 Vdc
– Device rating 440 to 550 Vac – test voltage is 500 to 1000 Vdc
– Device rating 2000 Vac – test voltage 1000 to 2500 Vdc
Caution: Never touch test leads during test and electrically
isolate the motor being tested
Mega-Ohm Testing (Continued)
• Record nameplate information
• Select test voltage
• To test insulation between lead and earth ground, connect 1
terminal to the lead and the other to a good earth ground
• To test between a winding and frame, connect 1 terminal to
the lead and 1 terminal to ground
• Test L1, L2 and L3
• For hand crank megger, turn at ~ 160 RPM
• Megger will indicate pass or fail
• Record test results, test every 8 to 12 months
Removal of Non-Condensable Gasses
Existence of Non-Condensable Gasses is the major cause of high
discharge pressure.
Air and Non-Condensable Gasses collect at the top of receiver.
Refrigeration reclaim equipment must be connected to the purge
valve on the receiver .
Hose from reclaim equipment must be able to depress Schrader
valve.
Remove small amount of refrigerant through reclaim device
Observe discharge pressure for 5 minutes.
Repeat until discharge pressure is normal, saturated discharge
pressure should be 11 to 17 degrees C above the ambient.
If discharge pressure fails to return to normal, reclaim refrigerant
charge, pump system into a vacuum and recharge with refrigerant.
Quick Probe Replacement
Turn off main power to Reefer Unit.
Open evaporator door. Use to door
prop in the evaporator deck to keep
the door opened.
Unbolt clamps from probe wire and
pull defective probe out of its
holder in the evaporator coil.
Cut the probe and the wire approx
6 inches from the end of the heat
shrink on the probe.
Splice new probe to the existing
cable and reinstall in its original
location.
Return
Probe
Probe
Clamps
Defrost
Probe
Bolt the clamps to the probe wire.
Receiver
Turn off main power to Reefer Unit.
Evacuate refrigerant from the
system (Follow Proper Procedure).
Loosen flare nuts from filter drier
and moisture indicator assembly
and remove.
Unbraze the ½” pipe from the top
of the receiver.
Receiver
Remove the bolts holding the
receiver to the side wall of the unit.
Receiver (Continued)
Remove hand valve from old receiver.
Install hand valve on new receiver.
Braze elbow into new receiver.
Bolt receiver to the side wall of the unit.
Install new filter dryer/moisture indicator assembly
(Follow Proper Procedure).
Reconnect piping to the new receiver.
Pressurize system to check for leaks (Follow
Pressure Check Procedure).
Vacuum System (Follow Vacuum Procedure).
Hand Valve
Recharge system with refrigerant (Follow Recharge
Procedure).
Special Note: When brazing dissimilar metals you
need to use special brazing rod.
Refrigerant Leak Testing
Check all joints and
fittings
The preferred method
for leak detection is
use of an electronic
leak detector
Leak testing with
soap suds will reveal
only larger leaks
Portable electronic
leak detectors are
usually used for field
testing.
Opening the Suction Access Valve
Remove Valve Cap
Turn CCW with wrench
to back seat
Adjusting Suction Pressure Regulating Valve
Right Side Suction Pressure Regulator & Hot Gas Valve
Electrical
connection to
Solenoid of Valve
Hot Gas Valve
Remove cap to
adjust suction
pressure regulator
valve
Electrical cable to
compressor
junction box
Adjusting Suction Pressure Regulating Valve (Continued)
•
•
•
•
•
•
•
Box temp should be above
5°C
Setting should be ~ 30 to
35 psig for R404A
Use 5/16 inch Allen wrench
to adjust
1 turn changes setting by
2.5 psig
CW rotation increases
pressure, CCW decreases
pressure
Run system 15 minutes to
confirm setting
Be sure to replace cap
Super Heat - Expansion Valve Adjustment
Super Heat - Expansion Valve Adjustment (Cont)
KLINGE CORPORATION
Super Heat - Expansion Valve Adjustment (Cont)
KLINGE CORPORATION
Thermostat Labels
Operator
Label
The revision level can
be found on both of
the front and side
label.
The front label is used
for normal operation.
Revision
Level
Thermostat Labels (Continued)
The side label is
used for function
test procedure only.
Touchpad
Turn off main power to Reefer Unit.
Unclip the ribbon cable from the back of the touch pad.
Remove the touch pad base that the touchpad is installed in.
On the back of the touchpad remove the four nuts that hold it
to the touch pad base.
Remove touch pad from the base.
Install new touchpad and four nuts.
Screw touch pad base back onto the sub panel.
Clip the ribbon cable back onto the back of the touchpad.
Touchpad
Turn off main power to Reefer Unit.
While releasing the locking tabs on the Thermostat Block
pull the Thermostat straight out towards you.
Unclip the ribbon cable.
Clip the ribbon cable into the new Thermostat.
Push the new Thermostat into the Thermostat Block until
secure.
Turn main power back on to the Reefer Unit.
Perform Function Test to ensure the new Thermostat
works properly.
TXV Power Head Replacement
Hook up gauges to the
suction and discharge
service valves to be able
to monitor pressures.
Turn the hand valve on the
receiver in to stop the flow
of refrigerant to capture the
Refrigerant in the receiver
and condenser coil.
TXV Power Head Replacement (Cont)
Turn the unit on and monitor the suction pressure into a
vacuum. Once in a vacuum turn the unit off and continue to
monitor for approx 10 minutes to assure the vacuum stays.
If after 10 minutes the vacuum
is still present turn the high side
service port in to guarantee no
refrigerant back-flowing through
the compressor.
Open Evaporator Door. Use to
door prop in the evaporator deck
to keep the door opened.
Remove cork insulation tape
from the suction line in the
evaporator section.
TXV Power Head Replacement (Cont)
Loosen the clamps holding
the power head bulb in place
on the suction line.
Using two wrenches hold the
TXV body with one wrench
and with the other wrench
loosens the power head from
the top of the TXV.
Install the new power head
element and tighten.
TXV Power Head Replacement (Cont)
Reinstall the bulb on the
suction pipe assuring that the
bulb is located at a 4 or 8
O’clock position on the pipe.
Re-insulate the bulb with cork
tape or some other insulation
material.
The insulation on the bulb is
VERY critical to ensure proper
operation.
TX Valve
Bulb Bracket
TXV Power Head Replacement (Cont)
Install new filter dryer/moisture indicator assembly
(Follow Proper Procedure).
Vacuum the suction side of the unit to 30” vacuum
and then shut down the vacuum pump.
Then release the Refrigerant from the receiver and
open the discharge valve.
NOTE: Under pressure in the system must be
avoided since a little air in will cause more problems
than a little refrigerant out.
This Unit Is Equipped with an Engine Control Unit
(ECU) KLINGE P / N K31 00826 00
THE ECU AUTOMATICALLY CRANKS, STARTS
& MONITORS ENGINE FOR OVERCRANK,
OVERSPEED, HIGH COOLANT TEMP, & LOW
OIL PRESSURE.
THE ECU IS LOCATED IN THE ELECTRICAL
BOX AND USES SIGNALS FROM A MANGETIC
PICKUP P/N K25 26241 02 TO MONITOR
ENGINE DURING CRANKING & RUNNING.
THE MAGNETIC PICKUP IS LOCTED CLOSE
TO THE BOTTOM OF THE ENGINE’S
FLYWHEEL HOUSING & IS CONNECTED TO
THE CONTROL BOX BY SHIELDED 2
CONDUCTOR CABLE.

IF THE SIGNAL FROM THE PICKUP IS NOT RECEIVED DURING CRANKING, ENGINE
WILL NOT START. IF THE SIGNAL IS LOST WHEN UNIT IS RUNNING, ENGINE WILL
SHUT OFF. IN BOTH CASES THE OVERCRANK & OVERSPEED LED’s OF ECU WILL
ACTIVATE.
KLINGE CORPORATION
ECU KLINGE P / N K31 00826 00 (Cont)
FOR PROPER OPERATION THE GAP BETWEEN THE TOP OF THE MAGNETIC
PICKUP & THE TOP OF THE ENGINE’s FLYWHEEL SHOULD BE 0.53 mm.
THIS GAP IS OBTAINED BY INSERTING THE PICKUP UNTIL IT LIGHTLY
TOUCHES A FLYWHEEL TOOTH & THEN BACKING IT OUT BY ½ A TURN. TO
MAKE SURE THIS GAP IS MAINTAINED, CHECK FROM TIME TO TIME THAT
THE LOCKNUT ON THE MAGNETIC PICKUP IS TIGHT.
KLINGE CORPORATION
ECU KLINGE P / N K31 00826 00 (Cont)
IF THE SIGNAL FROM THE PICKUP IS NOT RECEIVED DURING CRANKING, ENGINE
WILL NOT START. IF THE SIGNAL IS LOST WHEN UNIT IS RUNNING, ENGINE WILL
SHUT OFF. IN BOTH CASES THE OVERCRANK & OVERSPEED LED’s OF ECU WILL
ACTIVATE.
IT THE MAGNETIC PICKUP MUST BE REPLACED MAKE SURE THAT DURING
INSTALLATION IT FACES THE HIGHPOINT OF A FLYWHEEL TOOTH, TO ENSURE THIS
USE A FLASH LIGHT TO LOOK THROUGH THE MOUNTING HOLE & SLIGHTLY TURN
ENGINE UNTIL HIGHPOINT OF A TOOTH FACES THE HOLE.
THERE ARE 4 POTS TO ADJUST THE CONTROL SETTINGS & 5 SWITCHES TO SET
THE CRANK CYCLES AS SHOWN IN THE SKETCH.
TURNING THE POTS CLOCKWISE INCREASES THE SETTINGS, POTS ARE 25 TURNS
AND CAN NOT BE DAMAGED BY EXCESS TURNS.
SWI, SW2 & SW3 SHOULD BE ON, SW4 & SW5 SHOULD BE OFF.