TSE DPT60, Owner'S Manual

Page: 274 / 459

45
Series 90 Inspections and Adjustments
90000255
Checking Continuity of NSS
(Gauges installed in Servo Gauge Ports)
Checking Switch Continuity
Recheck switch continuity to determine whether addi-
tional adjustment of the eccentric plug is necessary.
WARNING
The following procedure may require the vehicle/
machine to be disabled (wheels raised off the ground,
work function disconnected, etc.) while performing
the procedure in order to prevent injury to the
technician and bystanders. Take necessary safety
precautions before moving the vehicle/machine.
S000 007E
1. Install two 50 bar (or 1000 psi) gauges in each of the
displacement control cylinder gauge ports (M4 and
M5). Attach a continuity checker to the terminals of
the neutral start switch.
2. Energize the starter circuit, and start the prime
mover.
3. While operating at normal speed and with the pump
in its “neutral” (zero flow) position, note the pressure
reading on the gauges. This reading should be noted
as the base pressure.
4. Slowly move the control handle in one direction while
observing the pressure gauges and the continuity
checker. Continuity
must be broken before the pres-
sure on either gauge increases more than 1 bar
(12 psi) from the base pressure obtained at “neutral.”
5. Slowly move the control handle in the opposite
direction. Again, continuity must be broken before
the gauge pressure increases more than 1 bar (12 psi)
from base pressure.
6. Continuity must again be verified when the control is
returned to neutral.
7. If continuity is not broken at base pressure plus 0 to
1 bar (0 to 12 psi) in either direction, stop the prime
mover and readjust the eccentric plug as described
in the previous section. If the pressure difference is
equal in each direction but greater than 1 bar (12 psi),
loosen the switch locknut and turn the switch clock-
wise 1/12 turn (30°) to increase the sensitivity. Re-
tighten the locknut and recheck pressure differences
and continuity.
8. After verifying proper control and switch operation,
stop the prime mover. Remove the continuity checker
and pressure gauges. Reinstall the servo pressure
port plugs and reconnect the electrical leads from the
machine starter circuit to the neutral start switch.
Install and adjust, if necessary, the external control
linkage.