Valtra 6550 - Page 930

227
Model Code Page
51. Brake system
6000--8950 510 1
1. 9. 2002
1. 8. 2000
Contents
General (Op. no. 510)
Technical data 1...................................................................
Brake system, description 2.........................................................
Pressure air brakes (option) 6.......................................................
Reconditioning brakes (Op. no. 511)
1. Reconditioning service brakes:
A. Changing brake discs 1..........................................................
B. Adjusting brakes 2..............................................................
C. Bleeding brake system 2.........................................................
D. Changing brake housing 3.......................................................
E. Adjusting master cylinder pushrod clearance 3......................................
F. Adjusting brakes on tractors which have reverse drive controls (TwinTrac) 3..............
2. Pressure air brakes 4...........................................................
Reconditioning parking brake (Op. no. 521):
A. Adjusting parking brake 1........................................................
B. P arking brake on tractors equipped with HiTech Shuttle 2.............................
Technical data
Service brakes hydraulically controlle d disc brakes running in oil.
Parking brake mechanically controlled, acting on the foot brakes. In HiTech ---models the parking brake is control led
electro---hydraulically.
Tractors 6000---6400 and 8000 (---657975):
--- number of brake discs per brake (ceramic linings) 4 pcs..................................
--- number of brake balls per brake 6 pcs.................................................
--- friction surface per brake 880 cm
2
........................................................
--- brake disc, diameter ø 222 mm...........................................................
Tractors 6600, 6800, 8100---8400, 8050---8750, 6250Hi---8950Hi (also on 6000---6400 and 8000 from ser. no. 657976):
--- number of brake discs per brake (organic linings, 665437---) 5 pcs.........................
--- number of balls per brake 6 pcs.......................................................
--- friction surface per brake 3690 cm
2
/org (2650 cm
2
/sint)........................................................
--- brake disc, diameter ø 224 mm/org (ø 222 mm/sint)...........................................................
Tractors 6600---8750, 6650Hi---8950Hi: 50 km/h:
On traffic tractors (50 km/h) the splines of the inner drive shaft have been lenghtened, after which
the brake dics number can be increased to 6 pcs per brake (3+3). The disc linings are then of sinter type.
Tractors 8350---8950Hi (L32106--- ):
--- brake discs, 9,5” (243 mm)x7” (178 mm) 5 pcs..........................................
--- intermediate discs (s=5 mm) 3 pcs....................................................
--- friction surface/brake 2150 cm
2
/org...........................................................
Tightening torques
Brake disc attaching flange:
--- 6000---8950Hi 80 Nm.................................................................
--- 8350---8950Hi, L32106--- 45 Nm........................................................
Brake housing---final gear housing:
--- 6100---6400 and 8000 (8.8) 80 Nm.....................................................
--- 6600, 6800, 8100---8400 and 8050---8750 (10.9) 125 Nm....................................
Brake housing --- gearbox 270 ---330 Nm..........................................................
Rear wheel nuts 550 Nm.................................................................
Cab attaching bolts 200 Nm..............................................................
Brake pipe---master cylinder 20 Nm.......................................................
Setting s
Brake pedal free travel (latched together) 70---80 mm............................................
P arking brake free travel (at lever end) about 50 mm..............................................
Parking brake cable adjusting value, Power Shuttl e tractors 1---2 mm............................
Brake fluid SAE J1703......................................................................
Brake fluid reservoir 0,3 litres..............................................................