Mec 3072RT - Page 62

March 2008 "3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications
Page 3-10
Fuel Filter- Diesel
1. Turn OFF valve at fuel filter.
2. Place a suitable container beneath the fuel
filter assembly to catch spilled fuel. Clean the
filter area.
3. Turn filter cartridge ¼ counterclockwise
remove. Wipe the filter seal contact surface
with a clean towel and install a new filter.
4. Open valve at fuel tank and check for leaks.
5. Purge the air from the fuel system as follows;
• Fill fuel tank to the fullest extent. Open
valve on bottom of fuel tank.
• Loosen bleed screw on top of fuel filter
housing a few turns.
• Close the bleed screw when there are no
more bubbles.
• Open the bleed screw on the fuel injector
pump. Use the lift pump hand lever to
pump fuel to the injectors. Close the bleed
screw when there are no more bubbles.
Do not attempt to start the engine until
Step 5 has been performed.
6. If fuel becomes contaminated with water, use
the Water Seperator Valve at the bottom of
the fuel cartridge to drain water.
Idle Speed Adjustment - Diesel
1. Bring engine to operating temperature.
2. Slow engine to complete idle.
3. Adjust the Idle Stop Screw until the RPM is 950. Adjust slightly up or down to avoid
vibrations.
4. Hold the Idle Stop Screw while tightening the jam nut to prevent change in adjustment.
High Speed Adjustment - Diesel
IMPORTANT: In order to prevent electrical system damage, check the Throttle Solenoid
Adjustment after this procedure.
1. Bring engine to operating temperature.
2. Disconnect the Throttle Solenoid linkage at the clevis.
3. Manually pull the Throttle Lever until it contacts the High Speed Stop Screw.
4. Adjust the High Speed Stop Screw until the RPM is 3200 with the Throttle Lever against
the High Speed Stop Screw.
5. Turn off the engine and reconnect the Throttle Solenoid linkage at the clevis.
6. Hold the High Speed Stop Screw while tightening the jam nut to prevent change in
adjustment.
Hand
Lever
High Speed
Stop Screw
Idle Stop
Screw
.020
Throttle
Solenoid
Fuel Injector
Bleed Screw
Fuel Injector
Pump
Fuel Filter
Bleed
Screw
Lift
Pump
Throttle
Solenoid
Piston
Throttle
Solenoid
Adjustment
Fuel Filter
Housing
Fuel Filter
Cartridge
Water
Seperator
Throttle
Lever
Clevis
¼ Turn
to Remove