Door And Sleeper Compartment Ventilator Replacement (Series 90 Alum. Tilt Cab); Electric Windshield Wipers And Washers - Chevrolet 70 Series 1970 Service Manual

CAB AND BODY MOUNTINGS 1-8
3. If n e c e ssa r y , apply a light coating of se a le r
to edge of entire pinchweld flange.
4. With a ssista n t in cab, lift g la ss and w ea­
therstrip in p osition outside of cab opening. Hook
lip of w eatherstrip over low er pinchweld flange and
then push inward on g la ss while a ssista n t inside
cab pulls chalk lin e from groove of rubber w eather­
str ip . W eatherstrip lip should be lifted overp in ch -
w eld flange a s strin g is pulled. Check entire p e r ­
im eter of w eatherstrip to be su re w eatherstrip is
over pinchweld flange.
ELECTRIC WINDSHIELD
T w o-speed e le c tr ic type w indshield w ipers
are used on a ll S e r ie s 70 conventional cab m odels
and a ll s te e l tilt cab m odels covered by this man­
ual. Type of wiper used on rear engine m odels is
determ ined by the body builder.
A sin g le w iper m otor, mounted on engine sid e
of cowl, pow ers both w iper blades on conventional
cab m odels. Two separate m otors are u sed with
ste e l tilt cab m odels w here each w iper m otor is
bracket mounted to rear sid e of cowl under dash.
Steel tilt cab m odels employ sep arate wiper
motor control sw itches; the left sw itch incorpor­
ates a push-type control for operation of w indshield
w ash ers.
WIPER ARM ADJUSTMENT
To adjust sweep of blades to provide m aximum
v isib ility , turn on w ip ers, then note sw eep of arm s.
Figure 5—Wiper Arm Installed (Steel Tilt Cab)
DOOR AND SLEEPER COMPARTMENT
VENTILATOR REPLACEMENT
(SERIES 90 ALUM. TILT CAB)
PANEL REPLACEMENT (Fig. 4)
The fresh a ir ventilator in left door, safety
g la ss in right door, and slee p er com partm ent vent­
ila to rs a re retained in cab opening in sam e manner
a s w indshield. For replacem ent of th ese compon­
ents, refer to procedure d escribed p reviously
under "Windshield R eplacem ent."
WIPERS AND WASHERS
CAUTION: DO NOT A T TEM P T TO
M ANUALLY MOVE
DAMAGE TO LINKAGE OR MOTOR MAY
OCCUR.
If n e c essa r y , rem ove arm s a s follow s:
CONVENTIONAL CAB MODELS
1. P u ll outer end of arm away from g la ss
which w ill trip lock spring at b a se of arm and r e ­
le a s e spring from undercut of pivot shaft.
2. While holding arm in th is p osition , pull out­
ward on cap sectio n at b ase of arm to rem ove the
arm .
3. Arm can be rein sta lled in any one of se v ­
era l p osition s due to serra tio n s on pivot shaft and
in arm cap.
TILT CAB MODELS
Wiper A rm Adjustment (Fig. 5)
Wiper arm can be repositioned on pivot shaft
to provide proper sw eep a s follow s:
Figure 6—Blade Angle Adjustment (Steel Tilt Cab)
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL
W IPER ARMS AS