JLG sky trak mmv Service Manual page 159

15. Readjust the sling as needed to help balance the
cylinder in the sling during installation. When the cylinder
is properly inserted within the inner boom, carefully
lower the cylinder and remove the sling and hoist.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
16. Install the trunnion pin (15), one 1/2-13 x 6.00"
capscrew (16), and a new 1/2-13 elastic locknut (17).
17. Position one of the two extend cylinder trunnion clamps
against its mounting boss within the intermediate
boom. Use a long extension and socket wrench to
install two 3/4-10 x 4-1/2" capscrews (18) and 3/4"
lockwashers to secure the extend cylinder trunnion
clamps to the intermediate boom. Install the other
trunnion clamp.
14
18
15
18
18. Working from the rear of the boom, pull the attachment
tilt and fork side shift hydraulic hoses back until there
is approximately a 2" (51 mm) gap between the extend/
retract cylinder trunnion and the hoses.
19. Reinstall the attachment tilt and fork side shift hose
clamps (19) at the rear of the intermediate boom.
Model MMV Rev. 12/04
16
14
18
18
17
Note: ALWAYS use new o-rings when servicing the
vehicle.
20. Install new o-rings into the fittings. Lubricate o-rings
with clean hydraulic oil.
21. Remove the plugs and caps from the hoses and
fittings and connect the extend (20) and retract (21)
hoses to the extend/retract cylinder (22).
20
22
MM3570
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
Boom
19
MM3430
21
OT01712
4.15