PRONAR PT610, Operator'S Manual

Page: 99 / 131

SECTION 5 Pronar PT610
5.13
FIGURE 5.5 Adjustment of axle mechanical brakes
(1) expander arm, (2) expander shaft, (3) expansion ring
TABLE 5.2 Position of fork pin in expander arm
PIN POSITION [mm]
TYPE OF BRAKE SYSTEM
FRONT AXLE
L
1
REAR AXLE
L
2
Single line pneumatic system
Double line pneumatic system
Double line pneumatic system with ALB.
175
175
175
150
150
150
Adjustment should be conducted separately for each wheel. Expander arm (1) should be
moved by one notch in chosen direction. If the extent of cylinder action is still incorrect, move
the lever again. After proper brake adjustment, at full braking, the expander arms should
create the angle o 90
0
with the cylinder piston, and the stroke should amount to
approximately half the length of the total stroke of the piston. After brake release expander
arms may not be supported on any structural elements, because too little withdrawal of a
piston ram may cause abrasion of brake shoes in drum and result in overheating trailer
brakes. Expander arms, placed on one axle, must be positioned in parallel with regard to