SkyTrak 3606 Service Manual - Manual (Page 299)

Hydraulic System
9-105
f. Frame Tilt or Stabilizer Cylinder Installation
1. Lubricate the 1.5" diameter cylinder pins with multi-
purpose lithium-based grease.
2. Use a sling and hoist or other suitable lifting device to
help install the cylinder. Orient the cylinder with the
cylinder eyelet on top, the rod eyelet on the bottom
and the dual pilot-operated check valve facing the
rear of the vehicle.
3. Install the upper cylinder pin. Drive the lubricated
cylinder pin through the cylinder eyelet, frame mount
and self-aligning bearing. Secure the pin with a 5/16-
18 x 3-1/2" capscrew and 5/16-18 hex-lock nut.
Torque to 18 lb/ft (24 Nm).
4. Use new flat-faced O-rings when installing the upper
and lower hydraulic hoses. Install and tighten the
hoses onto the appropriate fittings on the dual pilot-
operated check manifold.
5. With the help of an assistant, start the engine.
Carefully and slowly, operate the joystick frame tilt
function to properly align the rod with the anchor
plate as required. Turn the engine OFF.
6. Install the lower cylinder pin. Drive the lubricated
cylinder pin through the rod eyelet, anchor plate and
self-aligning bearing. Secure the pin with a 5/16-18 x
3-1/2" capscrew and 5/16-18 hex-lock nut. Torque to
18 lb/ft (24 Nm).
7. Remove all tools, etc. from the vehicle. Carefully
remove the blocking supporting the vehicle frame at
the front and rear axles.
8. Start the engine and run at approximately one-third
to one-half throttle for about one minute without
moving the vehicle or operating any hydraulic
functions. Operate the joystick to fully tilt the frame
left and right at least five times each.
9. Inspect for leaks and check the level of the hydraulic
fluid in the reservoir. Shut the engine OFF.
Note: Check for leaks and repair as required before con-
tinuing. Add hydraulic fluid to the reservoir as needed.
10. Wipe up any hydraulic fluid spillage in, on, near and
around the vehicle, work area and tools.
g. Frame Tilt or Stabilizer Cylinder
Pressure Checking and Circuit Bleeding
1. Attach a 4000 psi (276 bar) gauge to the main control
valve at the extend base port relief to test the frame
tilt/stabilizer cylinder hydraulic system circuit
pressure. The unit is equipped with test fittings from
the factory. Pressure readings should be 3200 psi ±
100 psi (220,6 ± 7 bar).
2. Start with the frame tilt and stabilizer cylinders
balanced; that is, with the frame level.
3. Tilt the vehicle fully left. Hold the joystick at full tilt left
for several seconds, then tilt the vehicle fully right and
hold the joystick at full tilt right for several seconds.
Observe the readings on the gauge during the frame
tilt operations.
4. Level the frame. While leveling the frame, check the
pressure reading on the gauge.
5. Repeat steps 3 and 4 five times.
WARNING: Avoid prolonged engine operation
in closed areas with inadequate ventilation.
Failure to properly ventilate exhaust fumes can
result in death or severe personal injury.
Model 3606 • Origin 10/99