Labounty 513914, Safety, Operation & Maintenance Manual, Page: 95 / 98

Troubleshooting Section 7 Page 7
MOBILE DEMOLITION PROCESSORS
SPEED VALVE TROUBLESHOOTING GUIDE
There are two basic operating conditions of the speed valve that have a negative effect on proceesor perfor-
mance and require troubleshooting and adjustment or repair. The first condition occurs when the speed valve
does not seem to shift into the regenerative or speed mode, resulting in the proceesor closing slowly. The
second condition occurs when the speed valve does not shift out of the speed mode at the appropriate time,
resulting in a loss of proceesor cutting force. These conditions are referred to below with corrective actions
listed to remedy the problem. For complete step-by-step instructions on adjusting the speed valve, please
refer to page 4-37. If the problem still exists after attempting these adjustments, please contact your Stanley
LaBounty dealer or the Stanley LaBounty Customer Service Department for further instructions.
The following tools and equipment are needed to properly troubleshoot and adjust the speed valve:
• pressure gauges - two are recommended so that two test ports can be checked simultaneously
• diagnostic test fittings and tools for installing the fittings
• a set of open or box end wrenches (12mm - 19mm)
• a set of Allen wrenches (4mm - 12 mm)
SYMPTOM PROBABLE CAUSE REMEDY
1. Proceesor does not shift con-
sistently into speed mode when
closing the jaw
2. Proceesor shifts into speed
mode when jaw has been fully
opened, but will not shift if jaws
have only been opened partially
3. Proceesor jaw continues to
close after the proceesor has
shifted into speed mode and the
operator has let go of the control
4. Proceesor properly shifts into
speed mode but seems to lack
power
a. Pilot pressure setting is too high
a. Too much back pressure in the base
machine return line
a. The main valve spool in the speed valve
is not fully shifting out of speed mode
a. The main valve spool is not fully shifting
out of speed mode
i
. Adjust the pilot valve adjustment screw
counterclockwise in increments of 1/8 of
a turn (45˚) until corrected.
i. Minimize back pressure if possible by
using lines with larger diameters
ii. If (i.) is not possible or does not com-
pletely solve the problem, adjust the
main spool and then close adjustment
screw clockwise in increments of 1/8 of a
turn (45˚) until corrected.
i. Adjust the main spool adjustment
screw clockwise in increments of 1/8 of a
turn (45˚) until corrected.
i. Adjust the pilot valve adjustment screw
counterclockwise in increments of 1/8 of
a turn (45˚) until corrected
.