User Manual

Hydraulic System
8-24
L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
5. Place the cylinder barrel (1) in a soft-jawed vise or
other acceptable holding equipment if possible.
6. Carefully insert the cylinder rod assembly into the
tube.
7. Screw the head gland (6) into the cylinder barrel (1)
and tighten with a spanner wrench. Refer to Section
8.12.8, “Hy drau li c Cylin der Torque Spec ifi cati ons,”
for tightening guidelines for the head gland.
8. If applicable, thread the new counterbalance valve
into the block on the cylinder barrel.
8.12.6 G eneral Cylinder Installation
1. Grease the bushings at the ends of the hydraulic
cylinder. Using an appropriate sling, lift the cylinder
into it’s mounting position.
2. Align cylinder bushing and install pin, lock bolt or
retaining clip.
3. Uncap and connect the hydraulic hoses in relation to
the labels or markings made during removal.
4. Before starting the machine, check the level of the
hydraulic oil reservoir and if necessary, fill to full
mark with hydraulic oil.
5. Start the machine and run at low idle for about one
minute. Slowly activate hydraulic cylinder function in
both directions allowing cylinder to fill with hydraulic
oil.
6. Inspect for leaks and check level of hydraulic oil in
reservoir. Add hydraulic oil if needed.
7. If no leaks are present, operate the hydraulic
function at least twenty times at full throttle to bleed
any air from the cylinder and hoses.
Note: To bleed air from the tilt cylinder, operate the tilt
function along with the lift cylinder as described above.
More operation cycles may be required to clear all air
from the system.
8. Wipe up any hydraulic oil spillage in, on, near and
around the mac hine, wor k area and tool s.
9. Close and secure the engine cover.
10. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
8.12.7 Steering Cylinders
The steering cylinders are attached to each axle center
housing. Detailed axle service instructions are provided
in the following manuals:
L2906H, 2906H, 29.6 & 619A
Carraro F ront Axle Repair Manual (P/N 31200634)
Carraro Rear Axle Repair Manual (P/N 31200635)
3507H, 35.7 & 723A
Carraro F ront Axle Repair Manual (P/N 31200636)
Carraro Rear Axle Repair Manual (P/N 31200637)
NOTICE
Avoid using excessive force when clamping the
cylinder barrel in a vise. Apply only enough force to
hold the cylinder barrel securely. Excessiv e force can
damage the cylinder barrel.
NOTICE
When sliding the rod and piston assembly into the
cylinder barrel, prevent the threaded end of the
cylinder barrel from damaging the piston head. Keep
the cylind er rod cen tered with in the bar rel to pre ven t
binding.
MAH0160
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4
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6
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