Gearbox Repair

(see paragraph 7-15).

(d) Foot (see paragraph 7-11).

(h) Chain adjuster (see paragraph 7-14).

(i) Feed chain (see paragraph 7-23).

(j) Slabback (set paragraph 7-8).

(f) Feed motor and gearbox assembly (see para-

graph 7-16).

(k) Drifter drill (see paragraph 7-7).

(g) Feed chain sprockets, bearings, and shafts

(3) Adjust chain tension (see paragraph 7-13).

Note: Gaskets on gearbox covers are laminated. Record thickness of

7-21. Gearbox Repair

gaskets after removing. Use the same thickness when installing gearbox

covers.

a. Disassembly.

(1) Remove feed motor and gearbox assembly (see

(6) Remove six screws (14) and lockwashers (15).

paragraph 7-16).

Remove cover (16) and gasket (17) from housing (18). Dis-

card lockwashers and gasket.

(2) Remove drain plug (1) and allow oil to drain.

Reinstall drain plug.

(7) Remove shaft (19) from housing (18).

Note: Scribe feed motor and quill motor flange to ensure proper reas-

Note: Gaskets on gearbox covers are laminated. Record thickness of

sembly.

gaskets after removing. Use the same thickness when installing gearbox

covers.

(3) Remove four screws (2) and lockwashers (3) se-

(8) Remove four screws (20) and lockwashers (21).

curing feed motor (4) to quill motor flange (5). Remove

Remove fan brackets (22), cover (23) and gasket (24) from

feed motor and key (6). Discard lockwashers.

gear housing (18). Discard lockwashers and gasket.

(4) Remove four screws (7) and flatwashers (8).

(9) Remove four screws (25) and lockwashers (26).

Remove fan cover (9).

Remove quill motor flange (5) and gasket (27) from gear

(5) Hold quill shaft (10) in place and remove screw

housing (18). Discard lockwashers and gasket.

(11) and lockwasher (12) securing fan (13) to quill shaft.

(10) Block gear housing (18) with fan end facing up.

Remove fan. Discard lockwasher.