TM-9-2350-311-20-1
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS
AUGUST 1994
TM-9-2350-311-20-1 - Page 883 of 1275
9-9 SHIFT CONTROL LINKAGE AND NEUTRAL SAFETY SWITCH ADJUSTMENT —
CONTINUED
e. Adjustment
1
2
3
4
5
6
7
8
9
Place shift control lever (71) in neutral (N) position. Remove cotter pin (1), flat washer (2), and clevis pin (3)
from bell crank (56) to disconnect shift control inner rod (4). Discard cotter pin.
Place bell crank (56) parallel with lever (50).
Loosen nut (72) and adjust shift control inner rod (4) until clevis pin (3) can be easily installed. Install flat
washer (2) and new cotter pin (1). Tighten nut.
Remove cotter pin (8), flat washer (9), and clevis pin (10) to disconnect shift control inner tube (11). Discard
cotter pin.
Set base lever (67) at neutral position with contact pin spherical end detent (70) in base lever engaged with
neutral safety switch detent (73).
Verify that shift control lever (71) is in neutral (N) position.
Loosen nuts (74). Adjust shift control inner tube (11) until clevis pin (10) can be easily inserted into lever of bell
crank (56).
Install flat washer (9) and new cotter pin (8). Tighten nuts (74) on shift control inner tube (11).
With shift control lever (71 ) in neutral (N) position, disconnect shift control outer rod (27) from transmission shift
control lever (35) by removing cotter pin (24), flat washer (25), and clevis pin (26). Discard cotter pin.
10 Loosen nuts (75) and adjust rod to approximately 8.25 in. (21.0 cm) (centerline of bearing bore to centerline of
bearing bore). Tighten nuts.
11 Disconnect shift control outer tube (21) by pulling quick-release pin (17). Ensure control lever (71) is in neutral
(N) position and install shift control outer rod (27) in transmission shift control lever (35). Ensure lever is set in
neutral position of lever index (76) on transmission.
12 Install clevis pin (26), flat washer (25), and new cotter pin (24).
13 Loosen nuts (77) and adjust shift control outer tube (21) until quick-release pin (17) can be easily inserted.
Tighten nuts on shift control outer rod.
14 Move shift control lever (71) through all positions. In each position, check to see that transmission shift control
lever index (76) (located under shift control lever at transmission) indicates same as shift control lever position.
15 Set shift control lever (71) in neutral (N) position. Ensure transmission shift control lever index (76) and
transmission shift control lever (35) are set in neutral (N) position. Ensure neutral safety switch (63) is
activated.
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TM9-2350-311-20-1
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