Chevrolet 70 1969 Series, Shop Manual

Page: 167 / 913

REAR SUSPENSION
4B-28
frame; however, torque rods, springs, equalizing
beams, and other parts may be removed sepa­
rately as required.
Component parts may also be removed from
RS-380 rubber cushion suspension and will be
described later in text.
C AU TIO N : Before removing the tandem unit,
use jacks and other equipment to block vehicle
securely to prevent axle assemblies from rolling
or pivoting at equalizer beam ends when torque
rods are disconnected.
R E M O V A L - R T A N D RU M O D E L S (Refer to Figs.
8 and 9)
N O T E : The following procedure explains
method whereby the spring eyes are separated
from frame brackets. However, if frame can be
raised to any height and the spring forward
brackets are bolted to frame and not riveted, sep­
aration can be made between brackets and frame
rails. Also it would not be necessary to remove
the forward duals.
1. Block wheels on rear axle and disconnect
brake lines from axles. Raise and safely support
forward axle then remove forward duals.
2. Disconnect propeller shaft from forward
rear axle as explained in " P R O P E L L E R
S H A F T S ” (SEC. 4D).
3. Raise vehicle frame to remove load from
springs. Support frame securely and remove re­
bound bolt from bottom of spring rear bracket.
4. Remove lock bolt securing spring pin in
front bracket. Remove lubrication fitting from
inner end of pin. In some cases pin may be re­
moved with slide hammer and adapter from inner
side of hanger. If this is not possible, remove pin
using soft drift and hammer from outer side of
hanger.
5. Temporarily install single wheel on each
side of front axle so assembly can be removed
from under chassis.
6. Place jacks and other equipment at each
(AXLE M U S T BE IN O P E R A T IN G
P O SIT IO N BEFORE S A D D LE C A PS
ARE TIGHTENED)
1 Torque Rod (Rear)
2 Torque Rod Bracket
3 Torque Rod (Front)
4 Spacer
5 Frame Bracket (Front)
6 Frame
7 Forward Rear Axle
8 Spring Eye Bushing
9 Top Pad
10 Spring Saddle
11 Beam Center Bushing
12 Cap Screws
13 Spring Saddle Cap
14 Equalizing Beam
15 Top Pad U-bolt
16 Spring Assembly
17 Rebound Bolt
18 Spring Bracket (Rear)
19 Rearward Rear Axle
20 Spacer
T-2878
Figure 9 — Tandem Rear Axle Suspension (Hendrickson-RU) (Typicall
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M AN U AL