allen BDF4836B, Safety & Operation Manual

Page: 59 / 64

SECTION 3
SERVICE
050362 Page 59
3.3 - Trouble Shooting, continued
Problem Cause Solution
Augers slow or stop but roller functions normally
under load.
Auger is overloaded with concrete. Reduce concrete in front of augers.
Auger motor is damaged or worn. Replace auger motor.
Hydraulic hose quick disconnect is malfunction-
ing.
Replace quick disconnect.
Auger and roller stop under load. On/Off Valve relief valve pressure is set too low.
Adjust relief valve setting to 1800 * or replace
with valve with the correct relief pressure setting.
* 1800 PSI relief valve pressure should be verified
for replacement valves before installation.
Paving roller does not skew in proper direction but
roller is spinning in proper direction. Improper hookup of hydraulic lines to hydraulic
skew cylinder.
Reverse hoses leading to hydraulic skew cylinder.
Paving roller does not automatically skew full travel
in one or both directions.
Foreign object blocking full travel. Remove obstruction.
Nut on carriage center pivot shaft is too tight. Adjust nut tension.
Carriage center pivot shaft is binding.
Disassemble, clean and re-lubricate before reas-
sembling.
Speed and power loss for paving roller and auger. Worn hydraulic pump. Replace hydraulic pump.
AUTOMATIC REVERSING VALVE
Carriage rollers only work in Non-Reversing Mode
and will not go into Auto-Reversing Mode after
shifting the selector handle to Auto-Reversing
Mode.
Both the MV1 and MV2 Cartridge Valves are stuck
and not shifting.
Replace both Cartridges.
Carriage rollers only work in Auto-Reversing Mode
and will not go into Non-Reversing Mode after
shifting the selector handle to Non-Reversing
Mode.
Carriage blows relief in one direction in the Auto-
Reversing Mode.
If the carriage works in all modes except for one
direction in the Auto-Reversing Mode, either the
MV1 or MV2 Cartridge Valve is stuck in the shifted
mode.
Remove the 9/16 Hex Vent Cap on both the MV1
and MV2 Cartridge Valves. Insert a small screw-
driver or allen wrench into the vent cap holes. The
cartridge with the shallowest hole is the cartridge
that is stuck. In order to run the carriage until a
replacement cartridge can be obtained, use the
small screw driver or allen wrench to manually
push the cartridge spool in. If the depth of the vent
hole is the same on each cartridge, you have suc-
cessfully shifted the stuck cartridge. The carriage
will run in the Auto-Reversing Mode until the selec-
tor handle is moved.