5.2 Inspecting the adjustment function
5.2.1 Always secure the vehicle to prevent it from
rolling away before commencing repair and service
work.
5.2.2 The service/parking brake and, on buses,
the frequent-stop brake, must be released.
5.2.3 Check the supply pressure of the brake
system (target: >6.5 bar), connect an external sup-
ply to prevent loss of pressure.
5.2.4 Jack up the vehicle or axle and remove the
wheel (observe the information from the respective
axle/vehicle manufacturer).
5.2.5 Check the temperature of the brake disc. It
must be between -10°C and 50°C.
5.2.6 Check the clearance as follows:
5.2.6.1 Move the brake calliper backwards and
forwards in the guide to check that there is clear-
ance. If necessary, clean the brake and/or repair
the bearings (see Fig.) (see Chap. 9).
5.2.6.2 Actuate the brake once with medium
pressure (approx. 2-3 bar). If the brake cannot be
actuated, slide the brake calliper on its guide pin in
the direction of the centre of the vehicle (see Fig.).
5.2.6.3 Using a suitable tool, press the inner brake
pad (12) away from the pressure fittings (13)
(see Fig.).
5.2.6.1 - Sliding the brake calliper backwards and
forwards in the guide three times
5.2.6.2 - Sliding the brake calliper on its guide pin in
the direction of the inner pad
5.2.6.3 - Pressing away the inner brake pad
5.2.6.4 - Removing the cap and using the adapter
on the adjuster
Ensure that there is no dirt between the outer pad
backs and calliper contact surface as this could
produce inaccurate results. Clean if necessary.
Caution!
5.2.6.4 Remove the cap (37) with the tab (do not
lose the adapter (61) (see Fig.).
Removing the cap (37) with auxiliary equipment can
damage the adjuster seal.
5.2.6.5 Set the initial clearance to 1.3 mm by un-
screwing and then screwing in the brake with the
adapter (61). Set the clearance on the side of the
brake that is turned.
5.2.6.6 Actuate the brake 20x with medium pres-
sure (approx. 2-3 bar).
Function and visual inspection
16
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XL-SA40001RM-en-DE Rev A • 02.2016 • Errors and changes excluded © SAF-HOLLAND
