Chevrolet 10 Series 1967, Service Manual

Page: 79 / 605

BODY IB-17
F ig . 3 9 - Level Ride Adjustments
F ig . 40 - Ride Level Indicator
Fore and Aft Adjustment
Any point within the 4" travel may be selected by mov­
ing lever B, Figure 39, toward right hand side of truck to
disengage seat lock.
Torsion Bar Adjustment
The ratcheting adjuster lever (C, fig. 39) regulates
the amount of weight the seat will support. Proper ad­
justment places the up and down travel of the seat sus­
pension at the midpoint, limiting the occurrence of bot­
toming or topping of the suspension.
Proper adjustment is indicated by the ride level indica­
tor, Figure 40, which is located behind left frame up­
right. Position 3 in Figure 40 indicates correct adjust­
ment (tip just flush with forward edge of upright). If seat
is too stiff, the indicator will be in position
1
; if too soft,
in position 2. Adjust for position 3 by moving lever C,
Figure 39. Direction of ratcheting action may be changed
by moving control at base of lever. Turning lever clock­
wise increases the amount of weight the seat will support.
Service
Numbers in following procedures refer to Figure 41.
Torsion Bar
Removal
1. Wedge upper seat in top position by using wood shim
under tube located under front of seat cushion or by
shim under tube located below back cushion.
2. Remove preload on torsion bars by rotating adjuster
lever assembly (No. 30) counter-clockwise until ad­
juster assembly is disengaged from seat.
3. Disengage back cushion from seat assembly by re­
moving bolts and lockwashers (Nos. 52 and 47).
4. Disengage seat cushion from assembly by removing
nuts, lockwashers and washers (Nos. 48, 47 and 46).
Move seat cushion forward to free rubber rollers
(No. 45) from housing under seat cushion.
5. Remove right hand side panel assembly (No. 29) by
tapping out sideways. This allows yoke (No. 26) to
drop free (figs. 41 and 42).
6
. Remove torsion bar set (No. 27) from tube.
Installation
1. Insert torsion bar set (No. 27) in tube being sure
that bars are engaged in retainer (No. 25) inside
tube at left hand side of seat.
2. Replace right hand side panel assembly (No. 29) with
yoke (No. 26) held in position inside housing on side
panel. Engage yoke (No. 26) on free end of torsion
bar set (No. 27).
3. Line up side panels right hand and left hand retaining
the
2 0
" dimension over side panels.
4. Reassemble seat cushion moving from front of seat
toward rear in order to engage rubber rollers (No.
45) properly in housing under seat cushion.
5. Reassemble back cushion.
6
. Replace preload adjuster assembly being sure that
Nos. 38 through 41 are in their proper positions.
Engage yoke (No. 26) hooked ends over lugs on ad­
juster pin (No. 40).
7. Preload torsion bars by rotating adjuster lever as­
sembly (No. 30) clockwise (figs. 41 and 43).
8
. Remove wood shims.
CHEVROLET TRUCK SERVICE M ANUAL