A SERVICE OF

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8
POWER TAKE-OFF (PTO)
Peterbilt Motors Company 8-19
Three circuits are passed to the IP harness, PTO, pump mode sense, front axle clutch via the chassis to IP connection
(J161/P033).
Two 12-way connectors are provided to connect to the MX or ISX engine harness remote throttle/PTO connector
(P197/J197).
The Eaton PTO relay, MX PTO relay, Namco PTO relay, Namco pump relay and Namco front axle clutch relay are
located in a 40-way sealed relay box mounted behind the chassis node.
Fabco split shaft PTO/transfer case jumper harness:
There are 4 different split shaft PTO/transfer case jumper harnesses. They account for, rear & front axle,
rear & one PTO, rear & two PTO's, rear & front & one PTO configurations.
PTO sensor to chassis harness connector (P198/J198):
The chassis harness provides for a 4-way connector to connect to a PTO sensor harness. It will always be capped for
shipment to the plant (P198/J198).
Pin 1 - wht4395, provides vehicle ground for 2-pin PTO engagement switches
Pin 2 - gra4395, PTO engaged signal. When low activates the PTO engaged warning lamp.
Pin 3 - gra4355, pump mode engaged signal - When low activates the pump mode warning lamp.
Pin 4 - gra3521, rear axle clutch engaged signal - When low activates the front axle clutch warning lamp.