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Page 61
MC-T50E-02
C0-T50-80
HYDRO-BOOST
The Hydro-Boost is not serviceable. If the Hydro-Boost is not functioning correctly then it must be replaced.
Symptom Troubleshooting
Slow Brake Pedal
A. Excessive seal friction in booster
Overhaul with New Seal Kit.*
Return
B. Flared reaction end.
Replace Booster
C. Broken Piston return spring.
Replace Spring*
D. Restriction in return from Booster to Pump Reservoir
Clear or line replace line
E. Return line incorrectly connected
Correct plumbing.
F. Broken spool return spring.
Replace spring*
G. Heavy brake pedal.
Reposition pedal or add retracting spring.
Grabbing Brakes
A. Broken spool return spring.
Replace Spring.*
B. Faulty Spool action due to contamination
Flush steering while pumping brake pedal.
C. Low pump flow.
Tighten Belt.
Booster Chatter,
A. Slipping pump belt.
Tighten Belt.
Pedal Vibration
B. Low fluid level in Pump.
Fill reservoir-check for external leaks.
Accumulator leaks down. A. Two-function valve is faulty.
Replace valve and valve set.
Reserve System Does
B. Accumulator seal is faulty.
Replace 0-Ring.
Not hold charge
C. Pneumatic accumulator is faulty.
Replace accumulator*
Excessive Brake Pedal
A. Loose, glazed, or broken pump belt.
Tighten or replace belt
Effort
B. No fluid in pump
Fill reservoir and check for leaks
C. Leaks in system hoses.
Replace faulty parts
D. Leaks at tube fittings and connections
Tighten fittings or replace tube seats or 0-Rings.
E. Leakage at pneumatic accumulator seal.
Replace 0-Ring and retaining ring.*
F. Leakage at piston seal.
Overhaul with new seal kit.*
G. Leakage at input seal.
Overhaul with new seal kit.*
H. Leakage at cover to housing seal
Overhaul with new seal kit.*
I. Leakage at spool plug seal.
Overhaul with spool plug seal kit.*
J. Leakage at expansion plug.
Replace Hydro-Boost
Unit self-applies
A. Restriction in Booster return line.
Clear or replace line.
B. Return line incorrectly connected.
Correct plumbing.
C. Dump valve faulty.
Replace dump valve.*
Hydraulic fluid and components must be kept clean. Thoroughly clean exterior of any hydraulic component
before disconnecting hoses or fittings. Perform all maintenance and repairs in a clean environment. Do
not use cloth or paper towels to clean components due to possible contamination with lint or other fiber.
Failure to follow these guidelines will result in premature failure of hydraulic system components.
WARNING
Remove
1: Remove the dash assembly.
2: Press the brake pedal numerous time to
discharge the accumulator.
3: Remove the master cylinder from the Hydro-
Boost. Refer to Master Cylinder section for
procedure. DO NO press the brake pedal after
the master cylinder has been removed.
4: Disconnect hydraulic lines from the booster. Keep
the ends of the hydraulic lines higher then the
pump reservoir so the fluid does not bleed out.
5: Cap the hydraulic lines so the debris cannot enter
the lines. See caution text at beginning of this
section.
6: Disconnect the input push rod.
7: Remove the mounting bolts and remove the
Hydro-Boost-Boost from the vehicle.
Install
Install the Hydro-Boost in reverse order of removal.
Tighten the master cylinder mounting bolts per torque
listed in the Hardware Torque table at the end of this
section.
Use the following procedure to bleed the Hydro-Boost:
a) Fill the pump reservoir.
b) Connect the battery.
c) Turn the key switch ON and place the shift lever
in forward. Wait 5-seconds then turn the key off.
d) Fill the pump reservoir.
e) Turn the key switch on and place the shift lever
in forward.
f) Turn the steering wheel all the way to the left and
right 2-times.
g) Turn the key switch off.
h) Press the brake pedal 5-times.
i) Repeat steps (d) through (h) then go to next step.
j) If hydraulic fluid foaming occurs, wait 1-hour and
start again at step (d)
Normal driving will purge any remaining air is the system.
Summary of Contents for C0-T50-80
Page 6: ......
Page 12: ...Page 12 MC T50E 02 Introduction C0 T50 80 Notes...
Page 18: ...Service Maintenance Guidelines Page 18 C0 T50 80 MC T50E 02 Notes...
Page 22: ...Tool List Page 22 C0 T50 80 MC T50E 02 Notes...
Page 26: ...PM Schedule Page 26 C0 T50 80 MC T50E 02 Notes...
Page 36: ...Front Axle Page 36 C0 T50 80 MC T50E 02 Notes...
Page 51: ...Steering Page 51 MC T50E 02 C0 T50 80...
Page 53: ...Steering Page 53 MC T50E 02 C0 T50 80...
Page 54: ...Steering Page 54 C0 T50 80 MC T50E 02...
Page 55: ...Steering Page 55 MC T50E 02 C0 T50 80...
Page 56: ...Steering Page 56 C0 T50 80 MC T50E 02 Notes...
Page 63: ...sectiontitle Page 63 MC T50E 02 C0 T50 80...
Page 64: ...sectiontitle Page 64 C0 T50 80 MC T50E 02...
Page 78: ...Tires Wheels Page 78 C0 T50 80 MC T50E 02 Notes...
Page 84: ...Batteries Page 84 C0 T50 80 MC T50E 02 Notes...
Page 104: ...Replacement Parts Page 104 MC T50E 02 C0 T50 80 Not available at time of printing BATTERY LID...
Page 120: ...Replacement Parts Page 120 MC T50E 02 C0 T50 80 Not available at time of printing DECALS...
Page 133: ...Replacement Parts Page 133 Not available at time of printing MC T50E 02 C0 T50 80 Notes...
Page 134: ......