Curtis 9PH20S58 User manual

INSTALLATION & OWNER’S MANUAL
Rev. A, p. 1 of 4
(8/4/2015)
The contents of this envelope are the property of the owner.
Be sure to leave with the owner when installation is complete.
JOHN DEERE 4 FAMILY
HEATER KIT
P/N 9PH20S58
FITS 4044R, 4052R, 4066R
APPROXIMATE INSTALLATION TIME: 1 HOUR
p/n: IM-9PH20S58

BEFORE YOU START
HELPFUL REMINDERS:
A. Read and understand all instructions before beginning.
B. To avoid injury caused by hot engine coolant, make
sure the engine is completely cooled down before
beginning installation of heater.
TOOLS REQUIRED:
Set of standard and metric sockets Scissors Drain Pan
Set of standard and metric open end wrenches Phillip’s head screwdriver Teflon Tape
p. 2 of 4
Fig. 2.2
Fig. 3.1
Fig. 1.2
3/8” hose nipples
STEP 1: VEHICLE PREP
1.1 Remove the engine cover and drain the cooling system from the
petcock at the bottom right corner of the radiator.
1.2 Per figure 1.2, remove the 2 Allen plugs from the water pump
area and install the two 3/8” NPT nipples provided with Teflon tape.
STEP 2: HEATER
2.1 Remove plugs (if equipped) from heater hose ports.
2.2 Per fig. 2.2, mount heater to right side frame using screws in
heater housing.
STEP 3: ROUTING
3.1 Per figure 3.1, remove the plastic plugs and install the snap
bushings in the right side bottom of the cowl.
3.2 Per figure 3.2, push ends of heater hose through snap bush-
ings, from inside the cab, leaving a loop long enough to connect to the
heater.
Fig. 3.2
Bushings

p. 3 of 4
STEP 3 CONTINUED
3.3 Per figure 3.3, route the open end of the
hoses toward the front of the engine where the 3/8”
NPT nipples were installed in step 1.2
3.4 Connect the hoses to the nipples with hose
clamps provided, see fig. 3.4.
3.5 Cut hose to length and install to heater with
hose clamps provided.
3.6 Cut and splice the in-line shut-off valve into
the supply line (which comes from the top of the
thermostat housing), in a suitable location like the
one shown in figure 3.6. Attach using two (2) hose
clamps. Confirm the valve is all the way open.
NOTE: The in-line shut-off valve quickly converts
the heater into a summer time blower by preventing
hot water from flowing to the heater core.
3.7 Secure hoses with wire tires as necessary
to prevent rubbing against hot or moving engine
components. Wire tie the return hose to the air
cleaner bracket so it does not kink under its own
weight.
3.8 Using manufacturer’s recommended proce-
dure, refill the cooling system.
Fig. 3.3
Fig. 3.8
Wire tie
Fig. 3.4
Connect hoses
Fig. 3.6

p. 4 of 4
STEP 4: ELECTRICAL WIRING
4.1 Connect wire harness to heater, matching
the wire colors.
4.2 Remove the wiper connector cover from
the top of the cowl by removing the 2 thumb screws.
4.3 Remove the rectangular plug next to the
wiper switch and install the rocker switch with the
light bulb toward the bottom.
4.4 Connect the plug from the wire harness to
the switch and then snap the red switch cover into
place.
4.5 Matching colors, connect the two wires from
the harness to the terminals on the switched power
harness under the cover.
4.6 Per figure 4.6, coil up any extra harness be-
hind the cover and reinstall the cover.
4.7 Per figure 4.7, secure the wire harness un-
der the top lip of the cowl with two P-clips and hard-
ware provided.
STEP 5: FINISHING TOUCHES
5.1 Start the engine and check heater hoses
and make sure they get warm. If not, remove the
heater from its mount and let hang from hoses as
low as possible. If the heater and hoses still do not
get warm, temporarily put a clamp on the upper ra-
diator hose to force coolant through the heater.
Warning: To avoid engine damage, remove the
clamp as soon as heater gets warm. Reattach
heater to the bracket.
Fig. 4.6
Fig. 4.7
Secure here
HEATER SERVICE PARTS
QTY DESCRIPTION P/N
1 20,000 BTU HEATER 8SV-9PH20WG
1 HEATER MANUAL IM-9PH20S58
1 HEATER SWITCH 9SV-OHC6
1 HEATER SWITCH COVER 9SV-9PCD1B
1 HEATER WIRE KIT 9SV-KX9HTRWH1
20’ HEATER HOSE 9SV-HRH61-20
6 1” HOSE CLAMPS 9SV-9HR00601.0
2 3/8” NPT NIPPLE 9SV-9HR0045
2 IN-LINE SHUT OFF VALVE 9SV-UHTRILV
2 SNAP BUSHINGS 9SV-9DPSB