Chevrolet DB90 Series, Руководство по обслуживанию

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S ec. 13-230
RADIATOR AND SURGE TANK
Figure 3—Radiator Mounting (Models HC, JC , HH,
and
JH 9 0 ; DC, FC90
with NTC 335 Engine) (Typical)
RADIATOR MOUNTING
(MODELS HC, JC , HH, & JH 90
FC & DC90 WITH NTC 335 ENGINE)
Radiator low er mounting as shown in figure 3,
is of the foot-m ounted type.
RADIATOR CORE REPLACEMENT
(CO N VEN TION AL CAB MODELS
HC, JC , HH, & JH90)
REMOVAL
1. Gain a c c e s s to radiator co re as follow s:
a. F ib erg la ss Hood - T ilt the hood assem b ly
forw ard.
b. Sheet Metal Hood - R em ove the hood a s ­
sem b ly a s d escrib ed in SHEET METAL AND
FIBERGLASS (SEC. 11) of S e r v i c e Manual
ST135-70.
c. On m odels with sh u tters, c lo se sh u t-off
cock in air supply lin e at a ir tank and disconnect
a ir line from shutterstat body.
2. Drain radiator. D isconnect lin e s and drain
o il c o o le r . D iscon n ect a ll coolant h oles and o il
lin e s from radiator core a ssem b ly .
3. If veh icle is equipped with a ir conditioning
or pow er steerin g , rem ove cooling c o ils from
radiator. In addition, rem ove power steerin g r e s ­
er v o ir and receiver-d eh yd rator if attached to
radiator.
4. R em ove fan shroud attaching b o lts, then
lay shroud back over fan blade.
5. R em ove nut, w ash er, and bolt at upper end
of each radiator sta b iliz e r rod.
6. R em ove lock w ire, two b o lts, w a sh e rs, and
cu shions (fig. 3) from radiator support.
7. Attach a liftin g slin g or chain to each rad­
iator upper mounting bracket.
8. With a chainfall (using sling) carefu lly lift
radiator a ssem b ly from v e h ic le . R em ove upper
cushion (fig. 3).
INSTALLATION
1. Using a chainfall and slin g (attached to
radiator upper mounting brackets) carefu lly lift
radiator a ssem b ly into p osition in v eh icle .
NOTE: B e su re to in sta ll upper cushion on
radiator support (fig. 3).
2. In stall w a sh ers and cushions on two b olts
(fig. 3). In stall b olts through radiator support and
upper cushion into low er radiator tank. Torque
b olts to 130 to 140 foot-pounds. Install lockw ire.
3. In stall bolt, w ash er, and nut on each rad i­
ator s ta b iliz e r rod (fig. 1). Tighten nut on each rod
to 50 to 60 foot-pounds torque.
4. In stall fan shroud.
5. Install a ir conditioning and pow er steerin g
cooling c o ils , pow er ste erin g r e s e r v o ir , and r e ­
ceiver-d eh yd rator (if rem oved).
6. Connect a ll coolant h o se s and o il lin e s to
radiator core a ssem b ly .
7. If equipped, connect a ir lin e to shutterstat
and open sh u t-off cock in supply lin e at air tank.
8. B e su re h o se s, lin e s, b rack ets, o r fan
shroud w ill not in terfere with operation of fan.
9. Add coolant to radiator, sta rt engine and
allow it to w arm up. Inspect sy ste m for lea k s.
R echeck radiator coolant le v e l and add coolant if
n e c e ssa r y .
10. On m odels equipped with sh eet m etal hood,
in sta ll the hood a ssem b ly a s d escrib ed under
SHEET METAL AND FIBERGLASS (SEC. 11) in
Serv ice Manual ST 135-70.
RADIATOR CORE REPLACEMENT
(FC & D C90 WITH NTC 335 ENGINE)
REMOVAL
1. D rain radiator.
2. T ilt cab to fully tilted p osition a s d escrib ed
in "ALUMINUM TILT CABS" (SEC. ID) in S erv ice
Manual ST135-70.
3. D iscon n ect a ll h o ses from radiator, and
rem ove coolant le v e l indicator w ire from radiator
tank probe unit if so equipped.
4. On m odels with sh u tters, c lo s e sh u t-off
cock in a ir supply line at a ir tank and disconnect
a ir lin e from sh u tterstat body.
5. If veh icle is equipped with air conditioning
or pow er steerin g , rem ove cooling c o ils from
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL SUPPLEMENT