TM 9-2320-280-34
11-5. STEERING GEAR REPAIR (Cont'd)
b. Cleaning
Clean all parts (para. 2-13).
c. Housing Group Inspection and Repair
1.
Inspect housing (4) for breaks, cracks, chipped or broken retaining ring grooves (5) and (22), and
damaged sealing surfaces. Replace steering gear if housing (4) is damaged.
2.
Inspect housing (4) for crossed or stripped threads. Refer to paragraph 2-15 for thread repair.
Replace steering gear if housing (4) threads cannot be repaired.
NOTE
Rack piston bore has laser hardened tracks on side of piston bore
opposite pitman shaft cavity. These are not wear or scoring
indicators.
Inspect pitman shaft bearing bore only if pitman shaft bearing is
replaced. (Refer to steps 3 and 4.)
3.
Inspect pitman shaft needle bearing (21) for damage or wear (TM 9-214). Replace needle
bearing (21) if damaged or inside diameter (I.D.) (19) is worn below 1.2510 in. (31.750 mm). If
damaged or worn, replace needle bearing (21) as follows:
a. Using pitman shaft bearing remover/installer, remove bearing (21) from housing (4).
b. Lubricate bearing bore (20) and bearing (21) with hydraulic fluid.
c. Using pitman shaft bearing remover/installer and adapter ring, install bearing (21) until seated in
housing (4).
4.
Inspect valve bore (10), rack piston bore (5), worm shaft support bore (3), and pitman shaft bearing
bore (20) for rust, pitting, scoring, galling, and wear. Wear limits for bore I.D. are: valve bore (10)
2.034 in. (51.64 mm), rack piston bore (6) 3.128 in. (79.45 mm), worm support bore (3) 1.040 in.
(26.42 mm), and pitman shaft bearing bore (20) 1.766 in. (44.80 mm). Remove minor rust, pitting,
and scoring with crocus cloth. If bore(s) do not meet specifications, or if there is other unrepairable
damage, replace steering gear.
5.
Inspect check valve (9) for freedom of movement. If damaged, replace check valve (9) as follows:
a. Pry check valve (9) out of housing (4) with a small screwdriver.
b. Lubricate housing (4) and check valve (9) with hydraulic fluid.
c. Install check valve (9), using 3/8 in. (9.52 mm) outside diameter (O.D.) tubing, 4 in. (10.16 cm) long.
6.
Inspect side cover (1) for breaks, cracks, stripped or crossed threads (2), warped or damaged sealing
surface (7), and scored or worn bushing (8). Repair minor scoring and thread (2) damage. Replace
side cover (1) if bushing (8) is worn through or loose in bore. Replace bushing (8) if I.D. is worn over
1.248 in. (31.70 mm).
7.
Inspect housing end plug (23) for breaks, cracks, and chipped edges. Replace housing end plug (23) if
damaged.
d. Pitman Shaft Inspection and Repair
1.
Inspect pitman shaft (15) for bends, breaks, chipped, cracked, or broken gear teeth (14), wear on
bushing journal (18) or bearing journal (17), crossed or stripped threads, and bent or twisted
splines (16). Bushing journal (18) minimum O.D. is 1.2468 in. (31.699 mm) and bearing journal (17)
minimum O.D. is 1.2500 in. (31.750 mm). Repair minor thread damage. Replace pitman shaft (15) if
worn or unrepairable.
2.
Inspect lash adjuster screw (11) for free rotation in shaft (15), tight retainer plug (13), crossed or
stripped threads, and rounded hex socket hole (12). Repair minor thread damage. Replace pitman
shaft (15) if damaged.
11-14
Change 1
