MCi Crusader II 1989 Maintenance Manual page 14

Date
1-1-89
Page
1-8
MC-9 MAINTENANCE MANUAL
STEERING KNUCKLE BUSHING
REMOVAL AND INSTALLATION
The tool shown in figure 1-13 and a press of at least 5-ton
capacity is required to remove or install the bronze bushings in
the earlier MC-9 front axle knuckle, or to remove or install the
"Easy Steer" bushings in the front axle knuckles of the later MC-9
models.
Before beginning the removal or installation of the bushings.
fix the steering knuckle firmly on the bed of the press to avoid
knuckle slippage during the bushing removal or installation.
To remove the bushings. insert the tool's pilot end into the
bore of the bushing and press the bushing from the knuckle.
The procedure for installing the bushings will vary. depend-
ing on whether the bushing is of the bronze or "Easy Steer"
type. .
To install bronze bushings:
1 Align grease holes in bushing and in knuckle. The circum-
ferential grease groove should be positioned toward the end of
the king pin.
2.
First press bushing into knuckle approximately
1/a".
relieve
press pressure and check alignment of tool and bushing.
3. The bushing can now tie pressed in until it is .135" to .165"
from the inside machined surface of the knuckle. This applies to
both upper and lower bushings. Do not install seals until after
the reaming operation is complete. Refer to figure 1-15.
4. Using the ceamer shown in figure 1-14. finish the bush-
ings to 1.7965-to-1 7975 -inch diameter. The bushings must
also be in line with each other to within .001 inch. Refer to the
sizing procedure described later in this section.
1.7965-1.7975 INCH
UPPER AND
LOWER BUSHING
(REAM DIAMETER)
t
Figure 1•15. Bronze Bushing Installation.
.135/.165
To install "Easy Steer" bushings:
1. Press the upper bushing approximately 1
/s"
into the
knuckle and relieve the press pressure. Check alignment of tool
and bushing.
2. The bushing can now be pressed to the desired depth of
0.477 inch to 0.507 inch from the top of the machined surface.
See figure 1-16.
3. Place the knuckle bottom side up and repeat step 1.
4. Press the lower bushing in to a depth of 0.412 to 0.442
inch from the bottom machined surface. See figure 1-16. Do
not install the grease seals until the reaming is completed.
5. Using the reamer shown in figure 1-14. finish the bush-
ings to 1.7950-to-1.7960-inch diameter. The bushings must
also be in line with each other to within .001 inch. Refer to the
sizing procedure described later in this section.
0.4n-0.507 INCH
UPt>ER KNUCKLE BOSS
BUSHING DEPTH
0.412-0.442 INCH
LOWER KNUCKLE BOSS
BUSHING DEPTH
1.7950-1.7960 INCHES
UPt>ER
I LOWER
BUSHING
REAM DIAMETER.
MACHINED SURFACE
KLE
E
SEAL LIP
BUSHING
UPPER
I
LOWER GREASE SEAL
SEAL INSTALLATION
Figure 1-16. Easy Steer Bushing lnstal'ation
and Grease Seal Installation.