JLG sky trak mmv Service Manual page 296

Engine: Cummins 4BTA 3.9
61. From within the cab, lightly depress the throttle pedal
(13) to full-throttle position. As needed, adjust the
limit-stop screw (14) until it touches the pedal. Tighten
the locknut (15) to 120-125 lb/in (13,6-14,1 Nm).
14
15
62. Have an assistant stand by with a Class B fire
extinguisher. Start and idle the engine.
63. Run engine to normal operating temperature then
shut off the engine. While the engine is cooling,
check for leaks.
64. 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.
8.44
65. The overflow tank (4) should be 1/4 to 1/2 full. If not,
66. Check for leaks from the engine, main hydraulic
13
IMPORTANT: During the full throttle check:
67. Obtain and connect an appropriate engine analyzer
68. Purge the hydraulic system of air by operating all
MA01912
69. Check for proper operation of all components.
70. Turn the engine OFF.
fill to this level with a 50/50 mixture of ethylene glycol
and water. Replace and tighten overflow tank cap.
pump and lines, transmission, hydraulic reservoir
and fuel tank. Check the levels of all fluids and
lubricants. Fill as required.
• DO NOT operate any hydraulic function;
• DO NOT steer or apply any pressure to the steer-
ing wheel;
• Keep the transmission in NEUTRAL [N].
or tachometer. Check the engine rpm at full throttle.
If the rpm is not 2600-2800 rpm, readjust the throttle
limit-stop screw at the throttle pedal within the cab.
boom functions through their entire range of motion
several times. Check the hydraulic oil level.
Model MMV Rev. 12/04