Lift Truck Stability Triangle

 

 

PART ONE: ITEMS TO BE CHECKED BEFORE STARTING THE MACHINE

Before I begin about the maintenance & troubleshooting solution for forklift truck. I think is very important to conduct a throughout check of the forklift truck before use so as to obtain satisfactory performance and working safety.


1. Items To Check Before Starting The Engine

Check if the fuel, lubrication oil and cooling water are sufficient for working.

Check if the lubrication parts are ensured with sufficient oil.

Check the air pressure of the tyres (standard: 7kg/cm²).

Check the free turning of the steering wheel (rightwise & leftwise less than 7º respectively).

Check the free stroke of the clutch pedal (standard: 20-25mm).

Check the free stroke of the foot brake pedal (standard: 9-15mm).

Check the electric system, ensure the joints is good and fastened to make circuit closed, and guard against short-circuit.

Check if all the hydraulic system are ensured without leakage.

1.1 Starting The Engine

Put the gear-box handle in middle position (idle position)

The hand-brake must be in working condition

Turn on the master switch, press button of the starter and engine begins to work. The starter must not over 15 seconds continously. After failure in starting, it must be interrupted for 1 or 2 minutes before a second starting.

PART TWO: TROUBLESHOOTING SOLUTION

Troubleshooting

Transmission System

Problem	Cause	Solution
Rotation of gears become unsmooth	Lack of lubrication oil; The fitting between gear and shaft sleeve too tight	Add in enough lubrication oil; Grind sleeve or replace gear
Squaeak from the gear	Excessive wear of gears; Excessive wear of the bearing	Replace
Disengagement	Deformation or wear of the shift fork; Unsufficiency or break of set spring of the fork spindle	Replace

Driving Wheel & Brake System

Problem	Cause	Solution
Oil leak in the brake drum	Spoilt seal; Oil leakage of wheel cylinder	Replace seal; Replace rubber cup and seal
Noise from axle	Excessive wear of taper gear; Excessive wear cross shaft of different gear; Excessive wear of taper roller bearing or become loose; Lack of lubricant oil	Replace gear or adjust the clearance; Replace or adjust bearing; Add in sufficient lubricant oil
Poor foot braking	Excessive clearance between drum & shoe lining; Clumsiness of master pump rubber cup; Air in the tube; Oil leakage; Excessive wear of lining; Excessive free stroke of brake pedal	Adjust the drum & shoe lining; Replace the rubber cup; Bleed the lining; Replace the brake pedal