Relay Contacts

TM 10-3930-628-12

b. Removal. Refer to figure 4-11 and remove

4-29.

Relay Contacts

contacts from contactor armatures.

a. General. Four contactor assemblies serve

c. Cleaning. Clean contacts with a fine file to

to connect components into the circuit. The contactors

remove rough spots and erosion. Replace contacts

are mounted in the contactor box at the front of the

when silver facings are almost worn through. Caution:

battery compartment below the seat. The contactors

Do not file or clean tips while they are installed in the

operate the hydraulic-pump motor, forward and reverse

contactor. Filings could cause damage to the electrical

motion (drive motor) and the emergency cutout.

system.

Contacts are made of a silver alloy. The contacts may

d. Installation. Refer to figure 4-11 and install

have to be dressed or replaced to insure proper

the contacts.

operation. Remove cover from contactor box to gain

access to the contactors.

Figure 4-11. Contactor box, installed view

4-13