Komatsu Forklift Trucks FG28HT-16

12. MASTS E-MS SERIES LIMITED FREE LIFT 2-STAGE MAST

1. Inspect the load rollers for excessive wear or damage. Rollers with visible flat spots or cracks should be replaced. See Figure 25a.

2. Inspect the load roller bearings by turning the rollers on their shafts. Rollers with roughness or noticeable restrictions to turning should be replaced.

3. Inspect the load roller stub shafts. If they are damaged or have cracks at the base, the upright mast must be re- placed or repaired.

4. Inspect the outer upright thrust plugs. If the wear surface is worn to less than 1/16 in. (1.5 mm), they should be replaced.

5. Inspect the hoist chains as described in Section 5.6-1.

E-MD SERIES FULL FREE LIFT 2-STAGE MAST

1. Inspect the load rollers for excessive wear or damage. Rollers with visible flat spots or cracks should be replaced. See Figure 39.

2. Inspect the load roller bearings by turning the rollers on their shafts. Rollers with roughness or noticeable restrictions to turning should be replaced.

7.2 PERIODIC INSPECTION AND MAINTENANCE CHECK POINTS

1. Abnormal noise when traveling

2. Oil level in differential casing

3. Dirt or stain with oil (see “DIFFERENTIAL TORQUES AND SEALS” on page 7-19 for checking oil level and replacing).

4. Oil leakage from differential casing

1. Deformation, cracks or scratches: Visual check on and around the frame and mounting bolt or welded area

2. Looseness of mounting bolt: Tightening torque ofmounting bolt

5.1.3 TORQUE CONVERTER ASSEMBLY

See drawing of “TORQUE CONVERTER ASSEMBLY” on page 5-4 for structure, which consists of following elements.

• Power Joint (Input Plate, Turbine Hub)

• Relief Valve (Main, Torque Converter Inlet Port, Lubrication)

Warning: This maintenance check requires trained personnel with PPE!

Check for deformation, cracks or scratches in the rear axle

Check for play of center pin in the rear axle

Check for clearance of thrust in the rear axle

Check for looseness of cap mounting bolt in the rear axle

Check for shaking, pulling or dragging in the steering wheel

Check for steering force (Control force) in the steering wheel

Check for play at engine idle in the steering wheel

Check for interference between wheel and other part of truck in the steering wheel

12. MASTS E-MS SERIES LIMITED FREE LIFT 2-STAGE MAST

Each pair of chains has been factory-lubricated using heat and pressure to force the lubricant thoroughly into the chain links. Avoid removal or contamination of this factory applied lubricant. Do not wash, sand blast, etch, steam clean, or paint the chains on initial mast installation.

The chains must be adjusted with equal tension to ensure proper load distribution and mast operation. To determine equal tension, extend the unloaded mast to put the chains under tension. Press the center of a strand of chain with your thumb, then press at the same place on the other chain of the pair. Each chain in a pair should have equal

“give”. If tension is not equal, adjust the chains as de- scribed in Chain Adjustment.

Inspect the chains. If inspection reveals that one strand of a pair of chains requires replacement, both strands of the pair should be replaced.

*Check for cracked side plates. If you find cracked side plates, replace both strands of chain.

*Check for tight joints. If tight joints are caused by rust or corrosion, loosen them with SAE 40 wt. oil or penetrating oil. If they cannot be loosened, or if the tight joints are caused by bent pins or plates or by peened plate edge, replace both strands of the chain.