SECTION 3
SERVICE
050362
Page 58
3.3 - Trouble Shooting, continued
Problem
Cause
Solution
Carriage does not move when power is applied.
Engine is under strain.
Carriage Shifting Mechanism cam arm follower is
not in “pave” position.
Check cam arm follower tension and verify that
cam arm movement is not obstructed.
Carriage decelerates, stops and then will not
accelerate.
Carriage Shifting Mechanism cam arm follower is
not adjusted properly.
Adjust upper rail or adjust cam arm.
See Maintenance - Shifting Mechanism.
Carriage Shifting Mechanism reversing valve
spool does not shift.
Check for cause and correct.
See Maintenance - Shifting Mechanism.
If valve mount bolts have recently been tight-
ened, the reversing valve body may be distorted
causing the spool to “bind”.
Loosen valve body mount bolts and tighten bolts
evenly a little at a time.
Automatic machine travel is more when carriage
is near drive end.
Upper rail on shifting mechanism requires adjust-
ment.
Adjust upper rail down.
See Maintenance - Shifting Mechanism.
Carriage travel does not slow down enough
before automatic reversing. The result is exces
-
sive jerking.
Cam arm requires adjustment.
Adjust cam arm.
See Maintenance - Shifting Mechanism.
Automatic machine advance is not functioning.
Manual bogie advance is functioning.
Check valve is stuck.
Lightly tap check valve. Replace valve if malfunc-
tion recurs. Valve is located beneath Power Unit.
See Parts Book
Speed and power loss for carriage travel drive
motor when carriage return direction is normal.
Clevis end or rear spool stop is unscrewing from
reversing valve spool.
Clean oil from clevis end threads. Assemble and
loctite.
Carriage travel reversing valve is worn or faulty.
Replace valve.
Hydraulic motor worn or damaged.
Replace motor.
Paving roller stops under load while augers oper-
ate normally.
On reversing valve, relief valve pressure setting
is too low or foreign material is unseating relief
valve
Adjust relief pressure setting * or disassemble
relief valve and remove material or replace with a
valve with correct relief setting. * 1200 PSI relief
valve pressure should be verified for replacement
valves before installation.
Paving roller does not operate or stops under
load. Relief valve is okay. Augers operate nor-
mally.
Roller motor is damaged or worn. Reversing
valve may have developed internal damage.
Replace motor.
Replace reversing valve.
Paving roller slows or stops under load.
Excessive bearing noise when roller spins or
bearing excessively hot.
Paving roller shaft bearings damaged.
Replace bearings.
Paving roller operates when carriage travels
in one direction but does not operate properly
and/or reverse when carriage travel direction is
reversed.
Hydraulic hose quick disconnect is malfunction-
ing.
Replace quick disconnect.
Summary of Contents for BDF4836B
Page 5: ...050362 Page 5 Table of Contents continued ...
Page 14: ...050362 Page 14 Notes ...
Page 15: ...SECTION 1 SAFETY 050362 Page 15 SECTION 1 SAFETY ...
Page 21: ...SECTION 1 SAFETY 050362 Page 21 PAGE LEFT BLANK INTENTIONALLY ...
Page 22: ...Notes SECTION 1 SAFETY 050362 Page 22 ...
Page 23: ...SECTION 2 OPERATIONS 050362 Page 23 SECTION 2 OPERATIONS ...
Page 40: ...Power Crown Lever Nut A SECTION 2 OPERATIONS 050362 Page 40 2 6 Power Crown Option ...
Page 46: ...Skew Clamp Skew Cylinder SECTION 2 OPERATIONS 050362 Page 46 2 7 Paving Operations continued ...
Page 49: ...SECTION 2 OPERATIONS 050362 Page 49 PAGE LEFT BLANK INTENTIONALLY ...
Page 50: ...SECTION 2 OPERATIONS 050362 Page 50 Notes ...
Page 51: ...SECTION 3 SERVICE 050362 Page 51 SECTION 3 SERVICE ...