Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout Matrix Single Traction Motor Trucks >S/N 10676

331PPA (V) PPA (V)One of three phases from the PPA to the Pump Motor. Voltage is measured between any two phases. If not present, check the PPA, wiring, and connections.

332PPA (W)PPA (W)One of three phases from the PPA to the Pump Motor. Voltage is measured between any two phases. If not present, check the PPA, wiring, and connections.

333TPA B+ B+ B+ from the battery to the TPA through fuse FT. If not present, make sure the battery is connected. Check fuse, wiring, and connections.

334TPA B– B– B– from the battery to the TPA. If not present, make sure the battery is connected. Check the wiring and connections.

335TPA (U) TPA (U)One of three phases from the TPA to the Traction Motor. Voltage is measured between any two phases. If not present, check the TPA, wiring, and connections.

336TPA (V) TPA (V)One of three phases from the TPA to the Traction Motor. Voltage is measured between any two phases. If not present, check the TPA, wiring, and connections.

337TPA (W)TPA (W)One of three phases from the TPA to the Traction Motor. Voltage is measured between any two phases. If not present, check the TPA, wiring, and connections.

0 to approx. 20VAC; approx. 200A ramping; approx. 250A full lift

0 to approx. 20VAC; approx. 200A ramping; approx. 250A full lift

PPAPM

PPAPM

Battery voltage wrt

0 to approx. 20VAC; approx. 50A ramping; approx. 35A full speed on jack

0 to approx. 20VAC; approx. 50A ramping; approx. 35A full speed on jack

0 to approx. 20VAC; approx. 50A ramping; approx. 35A full speed on jack

TPATraction Motor

TPATraction Motor

TPATraction Motor

Publication 1160093, Issued: 20 May 2013