JLG 4013PS Service Manual - Manual (Page 100)

Engine: Perkins 1104-42 & 1104-42T
7-4 3508PS, 3509PS, 3512PS, 3513PS, 4008PS, 4009PS, 4012PS, 4013PS, 4017PS, 40.8, 40.9
7.2 ENGINE SERIAL NUMBER
The Perkins serial number is stamped on a plate which is
secured to the engine block, near the fuel injector pump.
Information contained in the serial number is required in
correspondence with the engine manufacturer.
7.3 SPECIFICATIONS AND
MAINTENANCE INFORMATION
For engine, coolant and oil specifications, and
maintenance information, refer to Section 2, “General
Information and Specifications.”
Note: These instructions cover only the routine
maintenance, removal, installation and troubleshooting
of the engine. Refer to your local Perkins Engine
Distributor for assistance with comprehensive engine
diagnosis, repair and component replacement.
7.4 ENGINE COOLING SYSTEM
7.4.1 Radiator Pressure Cap
For a 99° C (210° F) system, use a 90 kPa (13 psi)
radiator cap. An incorrect or malfunctioning cap can
result in the loss of coolant and a hot-running engine.
7.4.2 Thermostat Replacement
Before considering thermostat replacement, check the
coolant level, fan belt tension and instrument cluster
temperature indicator.
• If the engine seems to take a long time to warm up,
the thermostat may be stuck in the open position
and requires replacement.
• If the engine runs hot, check the temperature of the
upper radiator hose.
• If the hose is not hot, the thermostat may be stuck in
the closed position.
• If the engine has overheated, performance may
suffer, indicating other damage including a leaking
cylinder head gasket, cracked cylinder head or
block, and/or other internal engine damage.
a. Thermostat Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Properly disconnect the battery.
5. Slowly turn the radiator cap to the first stop and allow
any pressure to escape. Remove the radiator cap.
6. Place a funnel at the base of the radiator to channel
the drained coolant into the container. Loosen the
drain plug and slowly remove to allow the coolant to
drain. Transfer the coolant into a properly labeled
container. Dispose of properly if coolant needs to be
replaced. Replace the radiator drain plug.
7. Remove the two capscrews securing the thermostat
housing (1) to the engine.
8. Remove the thermostat housing, old gasket and
thermostat. Clean all gasket surfaces. DO NOT let
any debris into the thermostat opening.
Note: ALWAYS use the correct thermostat and install a
new gasket. NEVER operate the engine without a
thermostat, or engine damage will result.
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