Tilt Cylinder Alignment. Doosan G33P-5 Plus

Tilt Cylinder Alignment

If the tilt cylinders are out of alignment, extra stresses in the mast assembly and the mast hinge area will result. To prevent damage, the tilt cylinders must stop evenly at the end of the tilt back and tilt forward strokes.

Tilt Angle Check

Tilt Angle Check (Typical Example)

The tilt angle of the mast must be checked in the full tilt back and full tilt forward positions. A tilt indicator or a protractor can be used to measure the angle. Both sides of the mast must be checked to make sure that the mast is not twisted.

The tilt angle is determined by the tilt cylinders used.

See tilt cylinders in specifications to determine the tilt angle from the cylinder being used.

Vehicle System 75 Testing & Adjusting

Tilt Cylinder Length Check

IDCS009P

Tilt Cylinder Length Check

1. Tilt the mast to full forward position. Measure the extended length of the cylinder rods from the cylinder housing to the mast. The difference of length between the two cylinder rods must be within 3.18 mm (.125 in) of each other.

Tilt Cylinders With Tilt Back Limiting Group

IDCS129S

Tilt Cylinder Adjustment

(1) Pivot eye. (2) Bolt. (3) Rod. (4) Shims. (5) Spacer.

(6) Head.

1. With the mast at full forward tilt, loosen bolt (2).

2. Slide spacer (5) back so rod (3) can be turned into or out of pivot eye (1) to obtain the correct length or angle.

WARNING

Tilt cylinder pivot eyes can loosen if the torque on the pivot eye clamping bolt is not tight enough.

This will let the tilt cylinder rod turn in the tilt cylinder eye. The cylinder rod may then twist our of the pivot eye and the tilt cylinder will be out of alignment or may let the mast fall and cause personal injury or damage. When the rod lengths are made even, the tilt angle differences or the mast alignment will no longer be a problem.

3. Tighten bolt (2) and the nut to a torque of 95 ± 15

N·m (70 ± 10 lb·ft). If the nuts had been removed completely, it needs to be replaced with the new ones.

4. With mast at full back tilt, install shims (4) as required to permit no gap between spacer (5) and head (6). Shim so mast does not twist at full tilt back.

Vehicle System 76 Testing & Adjusting