Dodge RAM TRUCK 1500 1995 Service Manual page 316

7 - 46 COOLING SYSTEM SERVICE PROCEDURES
B R
WARNING: CONSTANT TENSION HOSE C L A M P S
A R E U S E D ON MOST COOLING S Y S T E M H O S E S .
W H E N REMOVING OR INSTALLING, U S E ONLY
TOOLS DESIGNED FOR SERVICING THIS T Y P E OF
CLAMP, SUCH A S S P E C I A L CLAMP TOOL ( N U M B E R
6094) (FIG. S i ) . SNAP-ON CLAMP TOOL ( N U M B E R
HPC-20) MAY B E U S E D FOR L A R G E R C L A M P S . AL­
WAYS W E A R S A F E T Y G L A S S E S W H E N SERVICING
CONSTANT TENSION C L A M P S .
CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 67). If re­
placement is necessary, use only an original equip­
ment clamp with a matching number or letter.
Ordinary worm gear type hose clamps (when
equipped) can be removed with a straight screw­
driver or a hex socket. To prevent damage to
hoses or clamps, the hose clamps should be
tightened to 4 N-m (34 in. lbs.) torque. Do not
over tighten hose clamps.
For all vehicles: In areas where specific routing
clamps are not provided, be sure that hoses are posi­
tioned with sufficient clearance. Check clearance
from exhaust manifolds and pipe, fan blades, drive
belts and sway bars. Improperly positioned hoses can
be damaged, resulting in coolant loss and engine
overheating.
HOSE CLAMP HOSE
J9207-36
Fig. 66 Hose damp Tool—Typical
COOLING SYSTEM FIN—GAS ENGINES
Also refer to the proceeding Viscous Fan Drive sec­
tion for additional information.
REMOVAL
(1) Disconnect negative battery cable from battery.
(2) Remove throttle cable at top of fan shroud.
(3) All Except 8.0L V-10 Engine: Unsnap coolant
reserve/overflow tank from fan shroud and lay aside.
The tank is held to shroud with T-shaped slots. Do
not disconnect hose or drain coolant from tank.
TYPICAL
CONSTANT
TENSION HOSE
CLAMP
TYPICAL
HOSE
CLAMP
NUMBER/LETTER
LOCATION J9407-39
Fig. 67 Clamp Number/Letter Location
(4) The thermal viscous fan drive/fan blade assem­
bly is attached (threaded) to water pump hub shaft
(Fig. 68). Remove fan blade/viscous fan drive assem­
bly from water pump by turning mounting nut coun­
terclockwise as viewed from front. Threads on
viscous fan drive are RIGHT-HAND. A Snap-On 36
MM Fan Wrench (number SP346 from Snap-On
Cummins Diesel Tool Set number 2017DSP) can be
used. Place a bar or screwdriver between water
pump pulley bolts (Fig. 68) to prevent pulley from ro­
tating.
Do not attempt to remove fan/viscous fan drive as­
sembly from vehicle at this time.
Do not unbolt fan blade assembly (Fig. 68) from
viscous fan drive at this time.
(5) Remove four fan shroud-to-radiator mounting
bolts.
(6) Remove fan shroud and fan blade/viscous fan
drive assembly as a complete unit from vehicle.
After removing fan blade/viscous fan drive assem­
bly, do not place viscous fan drive in horizontal po­
sition. If stored horizontally, silicone fluid in the
viscous fan drive could drain into its bearing assem­
bly and contaminate lubricant.
CAUTION: Do not remove water pump pulley-to-wa­
ter pump bolts (Fig. 68). This pulley is under spring
tension.
(7) Remove four bolts securing fan blade assembly
to viscous fan drive (Fig. 68).
INSPECTION
The fan cannot be repaired. If fan is damaged, it
must be replaced. Inspect fan as follows: