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Service Manual
Adjustments
36
Series 90 Pumps
Neutral start switch adjustment requirements
NSS deadband
(switch closed, ON)
Control deadband
(neutral)
Total control
shaft rotation
Control shaft
P104 147E
Neutral start switch eccentric plug adjustment (condition i)
Center the NSS deadband and the control deadband in relation to each other. Since you cannot adjust
the position of the control deadband, you must adjust the position of the NSS deadband to match it. The
switch pin is located in an eccentric plug which you turn to move the center of the NSS deadband. Ensure
the MDC is installed on the pump and in its neutral position when adjusting the neutral start switch
eccentric plug. The accompanying drawing provides dimensions for an eccentric plug adjustment tool.
Eccentric plug adjustment tool
12.7
[0.5]
3.175
1.52
[0.125]
[0.06]
520L0818 • Rev 0101 • August 2015
Control shaft
(free-play)
9.14
[0.36]
25.4
[1.0]
P104 149E
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