6 SECTION 35 -- HYDRAULIC SYSTEM -- CHAPTER 3
603.54.471.00 -- 11 -- 2004
TRAILER BRAKE AUXILIAR Y CONTROL VALVE
LINKAGE ADJUSTMENT
Proceed as follows:
1. Adjust the brake pedal travel (8) as indicated in
section 33 chapter 1 page 20.
2. Adjust parking brake lever (9) as described in sec-
tion 33 chapter 1 page 20.
3. Fully tighten cup (4), slacken locknut (5) and ad-
just length of link (6), using wrench flats (C) to ob-
tain a clearance (G) of 0.3 to 0.5 mm (0.1118 to
0.01968 in.) between fork (7) and piston (10) of
trailer brake control valve.
4. Tighten locknut (5).
5. Disconnect trailer brake oil delivery line (3) from
brake control valve body (V).
6. Connect pressure gauge (M) with 0 to 250 kg/
cm
2
scale of kit 380000240 to control valve body,
using connections 380000841 (1) and
380000840 (2) (both connections belong to kit
380000240)
7. Start the engine and take the oil up to a tempera-
ture of 50 -- 60
°
C (122 -- 140
°
F).
8. Run engine at around 2000 rpm.
9. Check that pressure gauge (M) reading is zero
when brake pedals (8) are not applied.
10. Depress brake pedals until pedal free travel is tak-
en up and check on pressure gauge (M) that pres-
sure is 100 bar (1450.37 psi)
11. Repeat this operation at least three times, check-
ing that system pressure reading drops to zero
when pedals (8) are released.
12. Apply parking brake (9) a few times without de-
pressing brake pedals and check that pressure
reading on pressure gauge (M) remains at zero.
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