JLG 4017PS Service Manual - Manual (Page 144)

Hydraulic System
8-12 3706PS, 3707PS, 4014PS, 4017PS, 33.7, 37.6, 37.7
b. Disassembly
Dispose of the old reservoir according to local regulations
concerning hazardous materials disposal.
1. Remove the adapters (2) from the bottom of the
tank.
2. Remove the screws securing the hydraulic manifold
(3) to the tank.
3. Pull the hydraulic manifold out of the hydraulic tank.
c. Assembly
1. Install the hydraulic manifold in the hydraulic tank
using a new o-ring. Torque the six screws to
2,25 ±0,25 Nm (19.9 ±2 lb-in).
2. Install the adapters to the bottom of the tank. Torque
to 23±3 Nm (17±2 lb-ft).
d. Cleaning and Drying
If contaminated hydraulic oil or foreign material is in the
tank, the tank can usually be cleaned.
To clean the hydraulic oil reservoir:
1. Have a dry chemical (Class B) fire extinguisher near
the work area.
2. Remove the hydraulic oil reservoir drain plug, and
safely drain any hydraulic oil into a suitable
container. Dispose of hydraulic oil properly.
3. Clean the hydraulic oil reservoir with a high-pressure
washer, or flush the tank with hot water for five
minutes and drain the water. Dispose of
contaminated water properly.
e. Inspection
1. Inspect the hydraulic oil reservoir thoroughly for any
cracks, slices, leaks or other damage.
2. With the hydraulic oil reservoir removed from the
machine, plug all openings except one elbow fitting.
Install the elbow fitting, and apply approximately
7-10 kPa (1-1.5 psi) of air pressure through the
elbow. Check the reservoir for leaks by applying a
soap solution to the exterior and look for bubbles to
appear at the cracked or damaged area.
f. Reservoir Installation
1. Place the hydraulic oil reservoir into its original
orientation.
2. Secure the hydraulic oil reservoir to the frame with
the previous mounting hardware.
3. Uncap and connect the previously labeled hydraulic
hoses to their appropriate locations. Be sure all lines
are free of kinks and sharp bends.
4. Install hydraulic filter bracket and hydraulic filter.
5. Fill the reservoir with oil until oil level is visible in the
lower gauge window. Refer to Section 2.5, “Fluids,
Lubricants and Capacities.”
6. Check the hydraulic oil reservoir for leaks.
7. Install the lower reservoir cover.
8. Properly connect the battery.
9. Close and secure the engine cover.
10. Start machine and check all hydraulic functions for
proper operation. Check for any hydraulic oil leaks.
Shut machine OFF and check hydraulic oil level. If
oil is warm, oil level should be visible in the upper
gauge window. Add hydraulic oil if necessary.
11. Remove the Do Not Operate Tag from the ignition
key switch and the steering wheel.
MAM1110
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