BRAKES 5-17
M A IN C YLIN D ER -SIN G LE RESERVOIR TYPE
(Fig. 2 9 )
NOTE:
These main cylin d ers are o f the basic
sin gle hydraulic r e s e r v o ir type. C ylin d ers in
stalled on TA50-60 m odels have two pistons in
the body casting, side by side. One piston p r o
vid es a hydraulic assist fo r clutch operation.
Tilt Cab
Removal
1. T ilt cab fo rw a rd and block in place.
2. D isconnect brake and clutch lin es at cylin d er and slip
rubber dust boots o ff cy lin d er tubes.
3. R em ove 3 cylin d er attaching bolts and rem ove c y l
in der (allow in g brake and clutch pedal push rods to
fa ll lo o s e ).
4. R ep a ir the dual brake and clutch cylin d er as r e
quired. See d isassem b ly, inspection and assem bly
p roced u res.
Single Cylinder
1. D isconnect brake pedal return spring.
2. Disconnect the brake hydraulic line at the main c y l
in der mounted on the cab. A lso disconnect lin es at
the dash and toe pan.
3. R e m o v e
cylin d er
retaining
bolts
and
rem ove
cylin d er.
4. R em ove c o v e r fro m top o f cylin d er and dump out
fluid.
Disassembly (Fig. 2 9 )
Dual Cylinder
Brake Cylinder Side
1. R em ove piston stop snap ring.
2. R em ove piston, p rim a ry cup, cup expander, piston
return spring, check va lv e and check va lve seat.
Clutch C ylinder Side
R em ove same as brake cylin d er side except fo r r e
m oval o f check va lve and check v a lv e seat.
Single Cylinder
1. R em ove lock ring, secondary cup and piston from
main cylin d er.
2. R em ove the p rim a ry cup, sprin g va lve assem bly and
va lv e seat.
3. R em ove r e s e r v o ir c o v e r and gasket fro m top o f main
cylin d er.
Inspection and Repair
Clean a ll d irt and gre a s e fro m the main cylin d er with
denatured alcohol.
1. Wash a ll p arts in clean alcohol. Make sure that in
take and com pensating ports in main cylin d er hous
ing, b le e d e r holes in piston and vent in f i lle r cap are
clean and open.
NOTE:
B efo re washing p arts, hands must be
clean. Do not wash hands in gasoline o r o il b e
fo r e cleaning p arts.
Use soap and w ater to
clean hands.
2. Inspect cylin d er b o res to make sure they a re smooth.
3. Inspect p rim a ry and secondary cups, va lve and va lve
seat fo r damage o r sw ellin g. S w elling o f rubber
p arts is due to the use o f im p ro p er brake fluid o r
washing parts in gasoline o r kerosene.
NOTE:
The p rim a ry cup has a b rass support
ring vulcanized in its base to p reven t it fro m
imbedding in the b leed er holes during braking
action.
4. Check piston fit in cylin d er b ore (fig . 30). The
clearan ce between piston and w all o f the cylin d er
should be fro m .001" to .005".
5. Replace parts as required.
6. Check clearan ce between the edge o f the p rim a ry cup
and the edge of the compensating port. T o check this
clearan ce, p roceed as follow s:
a. P la c e sprin g assem bly in the housing bore with
the stamped re ta in e r toward the open end o f the
b ore.
b. P la c e p rim a ry cup o v e r the spring, with the fla t
side outward.
c. Using the piston push the cup inward su fficien tly
to allow assem bly o f the piston stop snap ring,
then re le a s e piston against snap ring.
d. Check clearan ce between the end o f the piston and
the snap ring.
This clearan ce should be .022
minimum. If the clearan ce is le s s than .022, the
p rim a ry cup should be replaced.
Assem bly (Fig.
2 9 )
Dual Cylinder
Brake Cylinder Side
NOTE:
M oisten a ll parts except snap ring with
brake fluid as a ssem b ly p ro g re s s e s .
1. C a refu lly position check va lve seat at outlet end of
cylin d er bore.
2. In sert check va lv e ; then the piston return spring with
p rim a ry cup expander toward open end o f cylin d er.
3. Install p rim a ry cup, s k irt fir s t. Take ca re that sk irt
is not ro lle d back o r torn during installation.
4. Insert piston with secondary cup toward open end o f
cylin d er. Same c a re to be observed on secondary cup
as on p rim a ry.
5. Install piston stop snap ring.
Clutch Cylinder Side
Replace same as brake cylin d er except fo r replacem ent
o f check va lve and check va lve seat.
Single Cylinder
NOTE:
M oisten a ll parts except snap ring with
brake fluid as assem b ly p ro g re s s e s .
1. Install va lve seat, va lv e , spring, and p rim a ry cup in
cylin d er b ore.
2. Install piston and secondary cup; secu re with lock
ring.
Installation
Dual Cylinder (Except Tilt Cab)
1. R e v e rs e above applicable rem oval proced u res.
2. F ill main cylin d er r e s e r v o ir and bleed b rak es as
outlined in this section.
3. Check operation o f brakes and clutch.
4. In stall c o v e r on main cylin d er.
Tilt C ab
1. A lign pedal push rods, position cylin d er against
mounting flange and bolt in place.
CHEVROLET TRUCK SERVICE MANUAL
Содержание 10 Series 1970
Страница 1: ......
Страница 38: ...HEATER AND AIR CONDITIONING 1A 8 CHEVROLET TRUCK SERVICE MANUAL...
Страница 57: ...HEATER AND AIR CONDITIONING 1A 27 Fig 35 Compressor M ountings CHEVROLET TRUCK SERVICE MANUAL...
Страница 75: ...HEATER AND AIR CONDITIONING 1A 45 Fig 65 R oof M ounted System W iring Diagram CHEVROLET TRUCK SERVICE MANUAL...
Страница 78: ......
Страница 101: ...BODY IB 23 s A ADJUSTER SCREW AND LEVER ASSY Fig 5 9 Exploded V iew o f Level Ride Seat CHEVROLET TRUCK SERVICE MANUAL...
Страница 137: ...BODY IB 59 VIEW IN DIRECTION OF ARROW A Fig 137 A u x ilia ry Seat CHEVROLET TRUCK SERVICE MANUAL...
Страница 142: ...CHEVROLET TRUCK SERVICE MANUAL Fig 5 10 30 Series Truck Frame FRAME 2 4...
Страница 145: ...CHEVROLET TRUCK SERVICE MANUAL FRAME 2 7...
Страница 148: ......
Страница 228: ...REAR SUSPENSION AND DRIVE LINE 4 52 I Fig 88 Forward Rear A xle Assembly Exploded V iew CHEVROLET TRUCK SERVICE MANUAL...
Страница 238: ......
Страница 383: ...ENGINE FUEL 6M 19 F ig I t Engine Fuel S p ecial Tools CHEVROLET TRUCK SERVICE MANUAL...
Страница 384: ......
Страница 392: ......
Страница 432: ...Fig 1 C lu tch Linkage Except P 2 0 4 0 Series...
Страница 433: ...CLUTCHES AND TRANSMISSIONS 7 3 Fig 2 C lutch Linkage Step Van P 20 40 Series CHEVROLET TRUCK SERVICE MANUAL...
Страница 506: ...FUEL TANK AND EXHAUST SYSTEMS 8 8 Fig 10 Vent Lines Cab M ounted Tanks CHEVROLET TRUCK SERVICE MANUAL...
Страница 528: ...Fig 31 T yp ica l Power Steering Hose Routings...
Страница 530: ......
Страница 550: ......
Страница 566: ...ELECTRICAL BODY AND CHASSIS 12 4 Fig 3 Front Lighting Assemblies CHEVROLET TRUCK SERVICE MANUAL...
Страница 567: ...ELECTRICAL BODY AND CHASSIS 12 5 Fig 4 C learance and Id e n tific a tio n Lamps CHEVROLET TRUCK SERVICE MANUAL...
Страница 568: ...ELECTRICAL BODY AND CHASSIS 12 6 Fig 5 Rear Lighting Composite CHEVROLET TRUCK SERVICE MANUAL...
Страница 597: ...ELECTRICAL BODY AND CHASSIS 12 35 Fig 37 Engine Com partm ent CE M E60 CHEVROLET TRUCK SERVICE MANUAL...
Страница 598: ...ELECTRICAL BODY AND CHASSIS 12 36 TO FRAME i f Fig 38 Engine Com partm ent C D 50 CHEVROLET TRUCK SERVICE MANUAL...
Страница 608: ...ELECTRICAL BODY AND CHASSIS 12 46 Fig 48 Instrument Panel C A40 CE CS ME50 Exc 02 CHEVROLET TRUCK SERVICE MANUAL...
Страница 610: ...ELECTRICAL BODY AND CHASSIS 12 48 Fig 50 Instrument Panel CE M E60 03 13 CHEVROLET TRUCK SERVICE MANUAL...
Страница 614: ...ELECTRICAL BODY AND CHASSIS 12 52 Fig 54 Instrument Panel SA40 50 CHEVROLET TRUCK SERVICE MANUAL...
Страница 628: ......
Страница 640: ......
Страница 649: ...SPECIFICATIONS 9 ENGINE SECTION 6 CHEVROLET TRUCK SERVICE MANUAL...
Страница 671: ......