Komatsu Forklift Trucks FG20HT-16

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

After each 500 hours of lift truck operation, and in addition to the Daily and 100 Hour Inspection:

1. Each pair of load rollers on the uprights and carriage should be shimmed so that a total side to side clearance no greater than 1/16 in. (1.5 mm) occurs at the tightest point throughout the travel of the member. Pry between the upright and load roller so that the opposite load roller is tight against the upright.

Measure the clearance for the pair of rollers at XXX shown. See Figure 10a.

2. Check the chains for wear and stretch. Refer to Section 5.6-1 for complete chain inspection.

E-MD SERIES FULL FREE LIFT 2-STAGE MAST

After each 500 hours of lift truck operation, and in addition to the Daily and 100 Hour Inspection:

1. Each pair of load rollers on the uprights and carriage should be shimmed so that a total side to side clearance no greater than 1/16 in. (1.5 mm) occurs at the tightest point throughout the travel of the member. Pry between the upright and load roller so that the opposite load roller is tight against the upright.

Measure the clearance for the pair of rollers at XXX shown. See Figure 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.

11.2 PERIODIC INSPECTION AND MAINTENANCE CHECK POINTS

1. Deformation, cracks or wear of fork stopper pin

2. Opening or difference in height of fork tips

1. Cracks or wear of upper and lower hooks

2. Cracks or wear of fork base/root

Check fork base thickness (C) for specified size

9.2 PERIODIC INSPECTION AND MAINTENANCE CHECK POINTS

Select dry and even surface road, drive at full speed and stop abruptly to check the following:

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