Checking Switch Continuity - Danfoss T90 Series Service Manual

Service Manual
Series T90 Axial Piston Pumps
Adjustments

Checking switch continuity

40 | © Danfoss | March 2020
Neutral start switch
Control shaft
Switch cam
1-1/8 in
Switch pin
27 N•m (20 lbf•ft)
Recheck switch continuity to determine whether additional adjustment of the eccentric plug is necessary.
W
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.
Checking switch continuity
Servo pressure gauge port M4
G
0 - 50 bar [0 - 1000 psi]
B 9/16-18
12 N•m [9 lbf•ft]
t
1. Install a 50 bar [1000 psi] gauge in each of the two servo 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. Note this reading as the base pressure.
4. Slowly move the control handle in one direction while observing the pressure gauges and the
continuity checker. The switch must open before the pressure on either gauge increases more than 1
bar [15 psi] from the base pressure obtained at neutral.
Switch lock nut
Neutral start switch
P104 148E
Servo pressure gauge port M5
G
0 - 50 bar [0 - 1000 psi]
9/16-18
B
12 N•m [9 lbf•ft]
t
P106 166E
AX216086485386en-000101