This instruction show you guide on how to bleed the brake system for Yale G807 forklift truck.
Hyster Yale iFak Diagnostic Kit
CAUTION
The brake system uses Dexron III (same as used in the transaxle). Use of other fluids can damage the brake system.
When the brake system is operating properly, the brake pedal will have back pressure that will stop the pedal before it can be pressed to the end of its mechanical travel limit. A brake system that has air present may have some back pressure but not enough to stop the pedal before reaching its mechanical travel limit. The pedal may feel soft and inconsistent (spongy) and must be bled before operating the lift truck.
NOTE:Bleeding air from the brake system requires two technicians. One technician must sit in the seat and operate the brake pedal while the other opens and closes the brake bleed valve located on the transaxle housing
To bleed air from the brake system:
1 Remove the floor plates and check that the master cylinder reservoir is full of oil.
2 One technician must sit in the seat and repeatedly press and release (pump) the brake pedal to increase the back pressure. The brake pedal may become harder to press as this occurs.
3 When back pressure seems to be at the maximum,the technician must press and hold the pedal as far as it will go.
4 The second technician must slowly loosen the bleed valve on one of the transaxle housings between the wheel and the frame. Air and oil should bubble from the valve until the pedal is pressed to its mechanical travel limit.
5 The pedal should be held in this position while the valve is retightened.
6 Repeat Step 2 through Step 5 until oil with no air (bubbles) flows from the valve. Check the oil level in the master cylinder every cycle and fill reservoir as necessary.
7 Perform Step 2 through Step 5 on the other transaxle until all air has been bled from the system.
