Possible Failures Of Brakes And Instructions For Their Troubleshooting - Belarus 1523.5 Operator's Manual

6.7 Possible failures of brakes and instructions for their troubleshooting

The list of possible brake failures and guidelines for troubleshooting are shown in table
6.7.
Table 6.7
Failure,
external manifestations, cause
Increased pedal free travel (in-
creased clearance between the
piston and the main cylinder piston
follower)
Presence of air in the hydraulic
brake control system
Hydraulic brake fluid shortage in
hydraulic brake control system
tanks
Loss of hermiticity in operating
spaces of main and operating cyl-
inders due to damage, wear and
tear of cups and O-rings
Hydraulic brake fluid leakage in
junctions or pipelines in the hy-
draulic drive system. Air inflow into
the hydraulic brake control system
Clogging of the opening in main
cylinder tank fitting, causing de-
pression in main cylinder, as a re-
sult of which air leaks into the cyl-
inder through sealings
Clogging of pipelines of the hy-
draulic drive system due to dent or
clogging
Insufficient brake pedal travel or
the pedal strikes against the cab
wall
Increased brake pedal operating
stroke which can not be adjusted –
wear of brake disks
Frictional brake disks are worn-out
Inefficient braking
Adjust pedal free travel
Bleed the hydraulic system with brake fluid
Bring hydraulic brake fluid in the main cylinder res-
ervoirs to the required level, then bleed the hydrau-
lic system with brake fluid
Replace the main and operating cylinder cups and
O-rings in case they are worn out. Check if the cyl-
inder bearing surface has sharpened edges,
ridges, or pits. Bleed the hydraulic system with
brake fluid
Tighten up junctions, replace damaged parts, then
bleed the hydraulic system with brake fluid
Unclog the opening. Then bleed the hydraulic sys-
tem with brake fluid
Replace pipelines. Then bleed the hydraulic sys-
tem with brake fluid
Adjust the clearance between the piston and the
main cylinder piston follower
Disassemble the brakes, replace worn-out disks.
Adjust the clearance in the friction couple and the
brake pedal operating stroke
Replace frictional disks
183
1523.5-0000010 OM
Troubleshooting