JLG T500J, Руководство по обслуживанию и ремонту

Страница: 204 / 306

SECTION 5 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
5-30 3121200
5.5 HYDRAULIC OIL FILL AT STARTUP
1. Fill the tank.
NOTE: Step 2 applies to Gas Engine equipped models only.
2. Loosen the outlet port hose of the pump until oil is seen.
This ensures that air has been bled from the suction line.
Without doing this step, there could be an air lock up on
start-up, which can damage the pump
.
3. Manually lay the outriggers out so the pads are on the
ground.
4. Retract the outriggers.
5. Extend the outriggers.
6. Refill the hydraulic tank.
7. Raise the boom up to horizontal.
8. Raise the Jib (if applicable) to full stroke. Lower the Jib
with manual descent. (Needle valve at the Jib cylinder).
Close the needle valve when the Jib is fully retracted.
9. Extend and retract platform level to full stroke in both
directions. Level the platform.
10. Lift up the boom to full stroke (or as high as the boom
will go).
11. Extend and retract platform level, then back to level.
12. Lift down the boom using manual descent. Bring the
boom down to the boom rest.
13. Repeat the lift up and down function using the switch,
not manual descent.
14. Telescope the boom out to full stroke.
15. Telescope the boom in to the end of stroke.
16. Swing the turn-table1/8th turn in both directions.
17. Retract the outriggers.
18. Refill the tank to the full mark on the dipstick.
5.6 HYDRAULIC HOSES
When replacing any of the hoses that run through the center
of the turntable, make sure the boom is positioned 180° oppo-
site from the tongue and not over the tongue. Failure to have
the boom properly positioned will cause the hoses to experi-
ence excessive twisting during swing operations and will
cause premature failure of the hose.
5.7 HYDRAULIC FILTER AND BREATHER
When changing the hydraulic filter, inspect the o-ring on the
cap for any nicks or tears. Replace the o-ring if there is any
damage. Check the breather line (clear line) that runs from the
hydraulic tank to the breather to ensure it is free from oil and
not pinched or damaged. If oil has ever entered the breather, it
must be changed. This can happen if the hydraulic tank is
overfilled or the breather line gets pinched.
NOTE: The cap securing the filter must be torqued

154 to 170 ft.lbs. (209 to 230.5 Nm).