JLG sky trak mmv Service Manual page 58

General Information, Specifications and Maintenance
b. Hydraulic Oil and Hydraulic Oil Filter Change
50
OH26701
1 000
MS21902
Change the hydraulic oil filter after the first 50 hours of en-
gine operation, and every 1,000 hours of operation there-
after.
Also, the hydraulic filter must be changed anytime the hy-
draulic oil filter restriction warning indicator light (1) on the
operator's instrument panel begins to flicker ON and OFF
at high idle.
1. Level the vehicle, ground the attachment, place the
travel select lever in the [N] NEUTRAL position, place
the neutral lock lever in the [N] NEUTRAL LOCK
position, and engage the parking brake switch.
WARNING:
hydraulic oil, or the hydraulic oil filter with the
engine running. Contact with moving parts can
cause death or serious injury.
2. Fully retract all hydraulic cylinders and shut the
engine OFF.
2.42
OT0840
OS0840
1
OM07312
DO NOT change the
3. Place an Accident Prevention Tag on both the
ignition switch and steering wheel, stating that the
vehicle should not be operated. (Refer to Section
1.5, Accident Prevention Tag Usage .)
4. Open the engine cover. Allow the hydraulic oil to
cool.
5. Clean around the hydraulic oil filter head (2).
Loosen, but DO NOT remove, the nuts that secure
the hydraulic oil filter head to the hydraulic oil
reservoir (3).
6. Place a suitable container under the hydraulic
reservoir drain plug. The container must be large
enough to hold 30 gallons (113 liters) of hydraulic oil.
7. To facilitate removal of the hydraulic oil filter head
and filter, the hydraulic oil return line may need to be
swiveled out of the way, and the indicator wiring
unplugged. DO NOT crimp the hydraulic oil return
line or indicator wiring. Rotate and remove the
hydraulic oil filter head; be prepared for a large
amount of oil to be displaced.
2
3
8. Remove the hydraulic oil filter element (5) and
seal (6) from the hydraulic oil filter head (7). Dispose
of used filter properly.
9. Clean the filter head sealing surface.
10. Remove the magnetic drain plug (8) and allow the
hydraulic oil to drain into the container. Clean loose
particles from the magnetic drain plug. Transfer the
used hydraulic oil to a container with a cover and
label the container as used hydraulic oil. Dispose of
used oil at an approved recycling facility.
11. Reinstall the magnetic drain plug into the hydraulic
oil reservoir.
12. Reinstall the top seal (6) and fully install a new
hydraulic oil filter element onto the hydraulic oil filter
head until the filter seats. Slide the filter assembly
into the reservoir (9). Secure the filter head by
tightening the nuts loosened earlier.
4
OT06602
Model MMV Rev. 12/04