JAWA Dandy MJ50, Руководство по эксплуатации и обслуживанию

Страница: 23 / 32

8.12. Front Wheel Brake Check and Adjustment
It is recommended to have the following work made by a special service.
For the front wheel hydraulic brake, the brake plates are self-adjusting. Due to wet, dirty or wear the
brake plates can become hardly movable in the disk brake yoke body after long use.
Clean the brake plates and contact surfaces in the yoke body. Check the thickness of the lining on the
demounted plates:
- minimum thickness of the lining (including supporting plate): 2.5 mm
After check or repair made install the plates back.
Replace damaged or worn out plates by new ones.
Regular inspection of the condition of the brake fluid in the tank is important. If there is found a less
amount of the brake fluid in the tank than it would be, it is probable that it leaks due to an untightness
in the braking circuit. Check all connections and hose for tightness.
If brake disk is stained by the brake fluid it is probable that the piston packing ring in the brake yoke
was damaged.
On each dissasembly of the brake plates check the pistons in the brake yoke for easy motion.
After repair of the front brake system it is necessary to carry out its deaeration!
Release the locking sheet of the brake yoke upper fastening bolt nut and release the bolt.
Unscrew the lower fastening bolt and remove it with all distance washers. Turn the yoke in such a way
that the deaerating screw will be in the highest position.
Insert a washer between the brake linings which thickness corresponds to the brake disk thickness
(Figure 30).
- Brake disk thickness: 4.5 mm
At deaeration of the front wheel brake, first remove the closing cap from the deaerating screw and put
the deaerating hose on it. Immerse the other end of the hose in a vessel filled partially with the brake
fluid
Then release the deaerating screw.
Press down the brake lever, and slowly release the venting screw, and again tighten it before you
release the brake lever to its original position.
Repeat the operation until the brake fluid without bubbles flows out of the deaerating screw. During
deaeration check the amount of fluid in the tank and refill it, if need be. After the brake deaeration, fill
the fluid up to the specified marks, and then close the lid on the tank (Figure 31).
WARNING!
Be careful at refilling - the brake fluid is agressive against varnish!
Air in the hydraulic brake system affect the brake function due to the brake fluid refilled late or due to
other leaks.
Have the brake repaired rather by a special service.
22