Komatsu Forklift Trucks FG25HT-16

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

Perform the following at the beginning of each work shift:

1. Extend the carriage a few inches off the ground and make sure the chains are under equal tension. Refer to Section 5.6-3 for chain adjustment.

2. Extend the mast to its fullest height to make sure the mast rails and carriage extend freely without binding.

3. While the mast is extended, inspect the upright rails for proper lubrication. Refer to Section 2.4-3 for rail lubrication.

4. Make sure the internal reeving hoses (if equipped) travel evenly in the hose guides. Adjust the hose ends if required. Tighten the fittings making sure they do not twist.

E-MD SERIES FULL FREE LIFT 2-STAGE MAST

Perform the following at the beginning of each work shift:

1. Extend the carriage a few inches off the ground and make sure the chains are under equal tension. Refer to Section 5.6-3 and 5.6-4 for chain adjustment.

10.2 PERIODIC INSPECTION AND MAINTENANCE CHECK POINTS

Check with oil level gauge and add oil if necessary. (Also check for oil contamination)

1. Cracks, scratches, deterioration or twist of piping

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.

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 rollers for excessive wear or damage. Rollers with visible flat spots or cracks should be re- placed.

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

3. Inspect all welds between the carriage side plates and the carriage fork bars. If any welds are cracked, replace the carriage.

4. Inspect the roller stub shafts. If they are damaged or if there are cracks at the base of the stub shafts, the carriage must be replaced or repaired. Contact Komatsu Forklift for repair procedures.

E-MD SERIES FULL FREE LIFT 2-STAGE MAST

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

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

3. Inspect all welds between the carriage side plates and the carriagefork bars. If any welds are cracked, replace the carriage.