JLG G12-55A AccuPlace Service Manual - Manual (Page 89)

7.11 G10-55A & G12-55A AccuPlace
Engine
18. Install the battery and connect the (+) positive and
(-) negative cables.
19. Check that all hydraulic system, electrical system,
cooling system, fuel system and exhaust system
connections are correct and connected tightly.
20. From within the cab, lightly depress the throttle pedal
to full-throttle position. As needed, adjust the limit-
stop screw until it touches the pedal bracket.
Note: Have an assistant stand by with a Class B fire
extinguisher.
21. Start the engine and run to normal operating
temperature then shut off the engine. While the
engine is cooling, check for leaks.
22. Allow the engine to cool. Check the radiator coolant
level, and top off with a 50/50 mixture of ethylene
glycol and water. Replace the radiator cap.
23. Check for leaks from the engine, main hydraulic
pump and lines, transmission, hydraulic reservoir
and fuel tank. Check the levels of all fluids and
lubricants. Fill as required.
Note: During the full throttle check:
• DO NOT operate any hydraulic function.
• DO NOT steer or apply any pressure to the steering
wheel.
• Keep the transmission in (N) NEUTRAL.
24. Obtain and connect an appropriate engine analyzer
or tachometer. Check the engine rpm at full throttle.
25. Purge the hydraulic system of air by operating all
boom functions through their entire range of motion
several times. Check the hydraulic oil level.
26. Check for proper operation of all components.
27. Turn the engine OFF.
28. Install the oil pan cover underneath the engine
compartment.
29. Close and secure the engine cover.
7.8 TORQUE CONVERTOR DIAPHRAGM
7.8.1 Torque Convertor Diaphragm Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the travel select lever in the (N) NEUTRAL
position, engage the parking brake, and shut the
engine OFF.
Note: In order to remove the engine drive plates, the
engine and transmission must be separated.
2. Refer to Section 6.5.1, “Transmission Removal,” or
Section 7.7.1, “Engine Removal.”
3. Remove the four bolts holding the diaphragms to the
flywheel.
4. With the drive plates and torque converter removed,
loosen and remove the four bolts (2) and eight lock
washers holding the two diaphragms (3) to the
torque converter (4).
5. Replace both diaphragms if damaged.
7.8.2 Torque Convertor Diaphragm
Installation
1. Install the two new diaphragms on the torque
converter and install the four bolts with lock washers.
2. Mount the diaphragm/converter assembly to the
transmission.
3. Refer to Section 6.5.3, “Transmission Installation,” or
Section 7.7.2, “Engine Installation,” for the remainder
of the installation.
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