C 1420 BOXER JD 1435 1445 SS Mount Instructions
User Manual: 1420
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Page Count: 9
John Deere
1420, 1435, 1445 Soft Side
Parts List & Mounting Instructions
Jodale • Perry
Printed: 2003/07
Standard Parts List
Qty Description Photo
L&R Rear Cab Brackets
L&R Rear Cab Side Panels (Plastic) installed
130 Amp Circuit Breaker
130 Amp Relay
2Cab Lift Brackets (1” Tube)
23/8” Black Snap Caps
1Ignition (Orange), Ground (Black), Power (Red Longer), Power Jumper
Harnesses (Red Shorter)
18” O-rubber, Clip-on, 180°
12.5 LF O-rubber, Clip-on, 90°
8” NDAX, 1” x 1”
22” NDAX, ½” x ¾” (seat plate)
NOTE: All references to left and right are taken from the operator’s point of view when he/she is
sitting in the driver’s seat.
John Deere 1420, 1435, 1445 Mounting Instructions
Standard Bolts List
Qty Description
4Bolt, Hex, 5/8” x 2”, Grade 8, Yellow Dichrome
2Bolt, Hex, ½” x 3”, Grade 8, Yellow Dichrome
2Bolt, Hex, ½” x 4 ½”, Grade 8, Yellow Dichrome
4Nut, Hex, 5/8”, Grade 8, Yellow Dichrome
4Nut, Hex, ½”, Grade 8, Yellow Dichrome
4Washer, Lock, 5/8”, Plated
4Washer, Lock, ½”, Plated
2Washer, Flat, Rubber, Trimmed 2 sides
2Washer, Flat, Rubber, Trimmed 1 side
2Washer, Flat, Steel, 9/16” x 2 ½” Trimmed 2 sides
2Washer, Flat, Steel, 9/16” x 2 ½” Trimmed 1 side
4Isolator, Rubber, ½” x 2 ½”, Black
2Tube Spacer Lower, 1”OD x 5/8”ID x 11/16”
2Tube Spacer Upper, 1”OD x 5/8”ID x 5/16”
3Nut, Hex, 10-24, Plated
3Screw, Pan-Head, 10-24 x 1”, Plated
NOTE: All references to left and right are taken from the operator’s point of view when he/she is
sitting in the driver’s seat.
John Deere 1420, 1435, 1445 Mounting Instructions
Optional Parts Lists
Heater Option (if equipped)
Qty Description Photo
14 LF 3/8” Heater Hose
13/8 NPT x 3/8” Barb - 180° Fitting (suction)
13/8 NPT x 3/8” Barb - 90° Fitting (pressure) (1445 ONLY)
116MM x 3/8” Barb - 180° Fitting (pressure) (1420 &1435 ONLY)
2HS-6 Hose Clamps
NOTE: All references to left and right are taken from the operator’s point of view when he/she is
sitting in the driver’s seat.
John Deere 1420, 1435, 1445 Mounting Instructions
NOTE: Use the following torque
specifications for all hardware: ½”
hardware 73 ft-lbs, 3/8” hardware 42
ft-lbs, 5/8” hardware 177 ft-lbs.
1. Prior to cab installation, remover the
upper section of the 2-post ROPS guard,
remove seat from seat plate.
2. Take the left rear bracket, one short
tube spacer, and one long tube spacer
and position it onto the left lower 2-post
ROPS member. Put the longer tube
spacer into the bottom hole of the ROPS,
and the shorter tube spacer into the
upper ROPS hole and loosely fasten the
rear bracket into place using the
hardware provided, 5/8” x 2” hex bolts,
nuts, and lock washers. Ensure that the
washer and nut are on the outside of the
machine side for space requirements.
Repeat for the right rear bracket, see
Figure 1.
3. Locate the tubing crossmember which
is located underneath the operator foot
platform. Use Figures 2 and 3 as a guide
and drill two 9/16” holes through the
tubing crossmember and the foot
platform.
4. Take the ½” x ¾” NDAX and position
it against the seat plate near the hinge
as shown in Figure 4. Peel back the
adhesive and glue into place.
5. Open the left door and right escape
window before proceeding with the
NOTE: All references to left and right are taken from the operator’s point of view when he/she is
sitting in the driver’s seat.
John Deere 1420, 1435, 1445 Mounting Instructions
Figure 1
Figure 2
See attached blueprint
Figure 3
18 ½” o.c.
Figure 4
following steps. Take the cab lift
brackets and bolt them onto the cab
frame with the ends sticking away from
the frame. Remove the shipping bracket
from the rear mounts and prepare to lift
the cab with an overhead hoist so that
the cab O-rubber cab be installed.
6. Take the 90° O-rubber and beginning
at the left rear corner, slide the rubber
onto the steel panel with the bulb facing
down, and work your way forward and
around the cab frame until you reach the
same point on the right rear corner of the
cab. See Figure 5 & 6. You will have to
put a separate piece between the front
mount plates.
7. Take the 180° O-rubber, and starting
where you stopped in the previous step,
slide the rubber onto the panel until you
reach the panel shown in Figure 7.
8. Using Figure 7 as a guide take the 1”
x 1” NDAX and glue it into the rear
panel as shown.
9. From where you left off in the
previous step, slide 90° O-rubber onto
the rear steel panel and then repeat for
the other side. See Figure 7.
10. Move to the lower two post ROPS,
and note the rear steel crossmember
bolted to the ROPS member. Loosen all
four bolts in order to make the
installation of the cab easier. Lift the
cab over the machine and slowly lower
the cab over the rear mounts. Place one
rubber isolator over each of the two rear
mounts, and over the two holes drilled
into the front platform. Once the cab is
lowered onto the rear mounts, take one
½” x 3” hex bolt, one 9/16” x 2 ½” steel
NOTE: All references to left and right are taken from the operator’s point of view when he/she is
sitting in the driver’s seat.
John Deere 1420, 1435, 1445 Mounting Instructions
Figure 5
Figure 6 90
NDAX 180
Figure 7
flat washer (trimmed 2 sides), one 9/16”
x 2 ½” rubber flat washer (trimmed 2
sides), one ½” lock washer, and one ½”
hex nut and loosely fasten each rear
mount. Repeat for the front mounts, but
use ½” x 4 ½” hex bolts instead and
loosely fasten the cab down. The front
mounts locate the cab frame front to
back, so tighten the two front mounts to
the torque spec first, and then the rear
mounts next, and finally the rear cab
brackets last. See Figure 8.
11. Use the attached wiring diagram as
a guide, and proceed with the wiring
hook-up onto the tractor.
Proceed with steps 12 & 13 if cab is
equipped with the heater option only.
12. Drain antifreeze from engine before
proceeding. Prior to proceeding, remove
the alternator belt. Remove engine plug
from the thermostat housing as shown
in Figure 9 in the lower right side. USE
A WATER SEALANT MATERIAL
AROUND ALL FITTINGS. Insert the
3/8 barb x 3/8 NPT 90° fitting (pressure)
into the plug hole (1445 only). Insert the
3/8 barb x 16MM 180° fitting (pressure)
into the plug hole (1420 & 1435 only).
Remove plug from near the water pump
in the upper left part of Figure 9 just
beside the thermostat sending unit.
Insert the 3/8 barb x 3/8 NPT 180° fitting
(suction) into the plug hole. Run the
hose to the heater fittings and ensure
that there is adequate hose and then cut
the hose. Attach the pressure hose to the
pressure fitting and the other hose to the
suction fitting. Attach the hose with two
HS-6 clamps. Re-install alternator belt
when complete.
13. Refill the engine anti-freeze. Open
the cab heater valve using the rotary
control on the switchplate and turn on
the fan. Start the vehicle and run at
PTO RPM for five minutes to build up
engine heat. Check for leaks and add
anti-freeze if required. For maximum
heater efficiency, all air trapped in the
heater system must be evacuated.
Continue running the engine and adding
antifreeze as required until cab heater
produces hot air. TIP: when purging
system of air, open radiator cap when
running the engine.
NOTE: All references to left and right are taken from the operator’s point of view when he/she is
sitting in the driver’s seat.
John Deere 1420, 1435, 1445 Mounting Instructions
Figure 8
Figure 9
1445 Shown
