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IV-135
HYDRAULIC UNITS
TRAVEL MOTOR
Parking brake
Symptoms
Major causes
Remedies
Braking force is
insufficient or not
evenly applied
• The total thickness of three friction discs
and four center discs is 13.5 mm or less
• Disc surface is faulty
• Spring is damaged
• Bolt for manual releasing is being fitted
• Replace the discs.
• Repair or replace.
• Replace the spring.
• Remove the bolt for manual release, and
fit the plug.
Abnormal heat gen-
eration due to brake
drag
Release of braking is faulty
• Oil leak due to O-ring breakage
• Orifice is clogged
• Pilot pressure for the releasing is not
working
• Replace the O-ring.
• Clean the orifice.
• Check whether the specified pressure
is generated in the pilot port, and then
check and repair each device.
Mechanical releasing of the brake
WARNING
While the brake is mechanically released, the
piston motor loses its mechanical braking ca-
pability. The mechanical braking capability of
the vehicle must be maintained by means of
a vehicle brake, or for stationary equipment,
must be maintained by means of an equipment
brake in order to avert any danger to life and
limb.
In case of lacking brake-bleeding pressure it may
be necessary to move a stationary machine. For this
purpose it is possible to release the brake mechani-
cally.
For mechanical releasing, prepare two socket head
screws 1 of M10×90 and two hard washers (2)
of M10. For brake releasing, the two socket head
screws must be turned uniformly in a clockwise
direction (alternately 1/2 rotation) in order to avoid
cocking of the piston.
Turning the screws pulls the brake piston against the
effect of the brake spring and thus the braking effect
is neutralized.
Turn the screws until they come into a contact with
the brake piston and continue until the piston comes
against the stop. The brake has been released.
Summary of Contents for TL150
Page 1: ...TL150 Track Loader BOOK No CT7E901 WORKSHOP MANUAL Serial No 21500004...
Page 4: ...0 4...
Page 5: ...I 1 I GENERAL...
Page 18: ...I 14 GENERAL...
Page 19: ...II 1 II SPECIFICATIONS...
Page 44: ...III 1 III MACHINE CONFIGURATION...
Page 94: ...III 51 MACHINE CONFIGURATION ELECTRICAL SYSTEM ELECTRICAL SYSTEM ELECTRICAL WIRING DIAGRAM...
Page 122: ...III 79...
Page 146: ...MACHINE CONFIGURATION III 103...
Page 147: ...IV 1 IV HYDRAULIC UNITS...
Page 152: ...IV 6 HYDRAULIC UNITS HST PUMP 1 Plug 2 Plug 3 Plug 4 Screw 5 Seal Nut 6 Plug Pump Assembly 4 4...
Page 189: ...IV 43 HYDRAULIC UNITS GEAR PUMP INSPECTION AND ADJUSTMENT IV 36 38 TROUBLESHOOTING IV 39...
Page 230: ...IV 84 HYDRAULIC UNITS PILOT VALVE INSPECTION AND ADJUSTMENT IV 79 TROUBLESHOOTING IV 80...
Page 261: ...IV 115 HYDRAULIC UNITS TRAVEL MOTOR DISASSEMBLY AND ASSEMBLY Special tools...
Page 263: ...IV 117 HYDRAULIC UNITS TRAVEL MOTOR...
Page 282: ...IV 136 HYDRAULIC UNITS TRAVEL MOTOR...
Page 283: ...V 1 V TROUBLESHOOTING...