Maintaining Guide Manual
of the Air Disc Brake
Content
CATALOGUE
1. Summarize
2. Maintaining description
2.1 Safety briefing during maintaining
2.2 Breaking function check
2.2.1 Clearance check
儿童读物排行榜2.2.2 Adjuster check
2.3 Brake pads check
2.4 Rotor check
3. Brake pads replacement
4. Brake replacement
5. Dust cap replacement
5.1 Dust cap & bushing replacement
5.2 Screw dust cap replacement
6. Rotor check/replacement
6.1 Rotor check
6.2 Rotor replacement
7. Brake chamber replacement
7.1 Brake chamber removal
中国试卷网7.2 Brake chamber installation
8. Adjuster replacement
9. Troubleshooting
entry10. Exploded view
11. List of mounting & maintaining tools
Brief introduction of YOUFIN
YOUFIN was established on May 20th, 1998. It is a Sino-Foreign joint-venture enterpri registered in Wuhan Economic and T echnological Development Zone with multi-investors among which private investors dominate. It is a professional company engaged in manufacturing disc brakes and rving the principal automobile manufacturers by providing modularized supply. The main prod ucts cover hydraulic disc brakes and air disk brakes in clo to thirty sizes.
YOUFIN developed the air disc brake autonomously and patented the product. So far we are the only manufacturer in China that can mass produce air discs to be ud in long distance coaches and
推广英文inner city bus. It is evaluated that the quality of our products is clo to the advanced international level in field u. The product development is part of the National T orch Plan and is also sponsored by the Small and Medium-sized Enterpri T echnical Innovation Foundation of Chine Ministry of S&T.
Our Air Disc Brake products are on an absolute leading position in China and the same international level as far as the key technology is concerned.
1. Summarize
YOUFIN Air Disc Brake has four sizes (16’’, 17.5’’19.5’’, 22.5’’). It can satisfy different vehicles. The brakes have compact structure; automatically wear compensation and can easily changing the brake pad.
2. Maintaining description
Safety briefing during maintaining
It’s most important to ensure safety driving and breaking by good
characteristics of the brake.
Obrve brake pad and rotor wear limits. When they warned already to assigned smallest thickness, it need replace immediately, otherwi, it may cau the accident. The pads scorches, grinds or greas must replace immediately.
Every pad on each bridge must replace at the same time.
When rvices the brake, the vehicle must park in smooth gound and the wheel withstand with the block/ stone prevent rolls.
Note:
●Must guarantee it does not occur with careless brake. When replace brake
pad don’t make the brake, otherwi, it will hurts the body!
●Do not u the compresd air or other cleaning up equipment clean the
brake, in order to avoid injures the body.
●Be sure your hands and fingers place outside the caliper, in order to avoid
injures the body.
●When moves and installs the brake should have some assistance, avoids it
搭讪开场白too heavy to hurts the body.
●When take off the brake to make maintenance, it must fix on the clamp with
英译汉词典high strength bolt, in order to avoid hurts the body.
●Only allowed genuine YOUFIN kits and pads permitted by YOUFIN. During
the first 50 miles driving after new pad replacement, should avoid promptly
brake and brake at a long distance, Prevent overhigh temperature.
●Allowed genuine YOUFIN kits and brake pads permitted by YOUFIN.
●Only can u the recommendation kits in rvice. Screws the bolt/nut
according to the request moment of force.
Brake Function check
gossip girl 第二季Clearance check
Process:
●T ake off the hexagon bolt (39), loon the pad retainer (38).
●Remove pad retainer (38) from caliper.
●Remove 3pcs of pad clip (37).
●Move the cable (40) to the side.
●Push the caliper towards the wheel and check the clearance with tune-up
gauge.
0.5mm ≤ clearance ≤ 1.2mm
Note: Inrt tune-up gauge between the caliper (1) and the brake pad (35). Should check the adjuster while the clearance is out of standard.
Adjuster check
Process:
●Remove the rubber cap (12).
●Turn hexagon head (22) clockwi by wrench to ensure clearance larger than
3mm. (Or remove the brake pad and the push board)
Note:
a. Need enough room (3mm<clearance) for turn adjuster preventing un-fit.
b. Never force to adjust the hexagon head (22) and/or the adjuster!
Push the pressure arm 5 times in small increments and obrve the hexagon head (22). While the adjuster is in good condition, hexagon head (22) must rotate clockwi.my favorite sport
c. As the regulated quantity increa, rotation angle decreas.
If the adjuster hexagon head (22):
a) Not running at all
b) Only running at first push
c) Running, but stopped in the middle
While considers adjuster failed. Y ou should replace the brake on the basis of ction 4 or change the adjuster in accordance with ction 8.
●Keep the clearances at 1mm (ction 3) after adjuster check is finished.
●Reinstall the rubber cap (12).
Brake pads wearing check
●Scorches, grinds and gread brake pad must replaces immediately.
●Brake pads at the same bridge must replace at the same time.
●Brake pad and pad clip must replace at the same time.
Rotor check
Process:英文书名怎么写
●Remove the brake pad according to ction 3.
●T est thickness of the rotor.
Note: Obrve the brake pads and the rotor attrition situation. Excessive attrition of the rotor and the brake pads will reduce their potency and caus the brake fail!
CAUTION: Rotors on the same bridge must replace at the same time. Single side rotor replacement is unacceptable. Recommend installs new brake pads while
replace the new rotors.
Rotor Dimension limits
Rotor jumpiness (↗) check:
2.4.1 Process:
●Installs division indicator on the bracket (dial guage).
●Measure jumpiness (↗) through turns the wheel. Jumpiness (↗) should less
than 0.15.
●Replaces the rotor to satisfy the request of ction 6.
●Modified brake pad should fulfil the specific requirements in ction 3.
2.4.2 Rotor test:
At each change of Pads check the Rotor for grooves and cracks.
The diagram at the right shows possible conditions of the surface.
A = Small cracks spread over the surface are allowed
B = Cracks less than 0.02in. (0.5mm) wide, running in a Radial direction, are allowed
C = Grooves (circumferential) less than 0.06in. (1.5mm) wide are allowed
D = Cracks in the vanes are not allowed and the Rotor MUST B
E REPLACED.
a = Pad contact area
3. Brake Pad replacement
Note: Do not u the pipe spanner/ board die! Keep your hands and fingers outside the caliper avoid the hurts of body!
Brake Pad dismantle process:
●T ake off hexagon bolt (39) from the Pad Retainer with spanner.
●Remove the pad retainer from caliper (1).
●T ake off the pad clip (37), which is above the pads (35,36) and push board (19).
●Remove the nsor on brake pad.
●T ake off the push board (19) & the brake pads (35,36).
●Adjust hexagon head to make tappet back to the initial position.
●Clean the pad groove & push board and anchor surface with brush.
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Note: Don’t hurt the dust cap (5 & 10). Be sure of no grea on installation surface!
●Check the adjuster on the basis of ction 2.2.2.
Note: Fix the key while checking & turning the adjuster cap to avoid screw rotate.
●Check the rotor according to ction 2.4.
3.2 Brake pad installing process:
●Need enough room between the caliper & the rotor to inrt brake pad.
●Inrt push board (19) at the place the caliper combine with the adjust screw.
Note: Push board must on the bracket supporting surface. Adjust screw pin must in groove. Otherwi it will do harm to Adjuster mechanism. Ensure the dust cap untwisted by rotate the adjust screw.
●Inrt the cable nsor to pad groove. Fix cable on bearing (40).
