
31200243 95
Operation Section
Illustration 154 g00964632
3. Locate the rear access cover on the right side of
the chassis. Remove the two washers and two
bolts that secure the access cover to the chassis.
Remove the access cover in order to gain access to
the control valve.
Illustration 155 g01205727
4. Locate control valve (14).
5. Measure the distance from the head of adjustment
screw (18) to the top of locknut (17). Completely
remove locknut (17). Turn the screw clockwise by
hand until the screw is tight. Use an allen wrench to
turn the adjustment screw clockwise in order to
retract the boom. Allow the boom to fully retract.
Note: If necessary, turn adjustment screw (18)
counterclockwise in order to stop the boom from
retracting.
6. When the boom has fully retracted, turn
adjustment screw (18) in a counterclockwise
direction until the adjustment screw is returned to
the original position.
7. Tighten locknut (17). If the boom needs to be
lowered, proceed to "Procedure for Lowering the
Boom".
Note: Do not start the engine until you have reset
adjustment screws (12) and (18).
8. Start the engine. Raise and lower the boom.
Extend and retract the boom approximately 300
mm (12 inch).
9. Position the boom to the fully retracted position.
Position the boom to the fully lowered position.
10. Remove the hydraulic tank filler cap. Add the 12 L
(3.17 US gal) of oil that was removed from the tank
in Step 3 of "Procedure for Draining Hydraulic Tank".
11. Check the oil level in the hydraulic tank. If
necessary, top up the hydraulic oil to the required
level. Install the hydraulic tank filler cap. Clean up
any oil that may have been spilled. Refer to
Operation and Maintenance Manual, "Lubricant
Viscosities" and Operation and Maintenance
Manual, "Capacities (Refill)" for further information.
12. Install the access cover on the chassis. Install the
rear cover for the boom.
Procedure for Lowering the Boom
Illustration 156 g01205730
1. Locate load control valve (19) for lowering the
boom. The load control valve is mounted to the
underside of the cylinder, and toward the rear of the
cylinder. The valve can be accessed from the
underside of the machine.
2. Slightly loosen locknut (21). Remove adjustment
screw (20) without rotating locknut (21) on the
screw. Measure the distance from the head of
adjustment screw (20) to the top of locknut (21).
Record this measurement. This measurement will
be required later when adjustment screw (20) is
reset. Spin locknut (21) to the head of adjustment
screw (20). Turn adjustment screw (20) by hand
into load control valve (19) in order to contact the
ball. Attach a wrench to adjustment screw (20) and
turn the screw clockwise until the screw becomes
tight.
Note: Do not use excessive force when a wrench is
used to turn adjustment screw (20).