Curtis 1MA5100PR Operating instructions

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INSTALLATION & OWNER’S MANUAL
Mahindra 5100
Cab with Heater (p/n: 1MA5100PR)
fits tractor models: 5145 & 5155 (Model Year 2022-)
(*=Not including accessories)
Available Options:
1. Front LED Work Lights (P/N: 9LEDW4)
2. Rear LED Work Lights (P/N: 9LEDW3)
3. Strobe Light (P/N: 9LEDS2)
4. Dome Light (P/N: 9LEDD14)
5. Side View Mirrors (P/N: 9PM5)
6. Rear View Mirror (P/N: 9PM3)`
7. Rear Wiper (P/N: 9PWK8512F9-11A)
8. Switch Panel (9PSF1)
9. Sure Step Kit (9CST)
Approximate Installation Time *
Experienced Dealer Technician – 3.5 Hours
Average Dealer Technician – 4.5 Hours
Do-It-Yourself – 5.5 Hours
Approximate Product Specifications
Floorboard to Roof Height: 63.5 inches
Weight: 385 lbs.
Cab Width: 64 inches
Rev. A, 01/25/2023
P/N: IM-1MA5100PR
The contents of this envelope are the property of the owner. Leave with the owner when installation is complete.
Shown with optional work lights.
While this cab kit was designed to fit on the vehicle(s) listed above, manufacturing tolerances and vehicle
assembly may affect cab fitment. It is the responsibility of the cab installer to check all vehicle pedals and
levers for full functionality and, as required, adjust the cab fitment to prevent any interference of the cab
components with the travel of pedals or levers.

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TABLE OF CONTENTS
WARNINGS, TIPS, & REQUIRED TOOLS...................................................... 3
CAB INSTALLATION.................................................................................. 4-17
CAB FEATURES & OPERATION.................................................................. 18
CARE AND MAINTENANCE......................................................................... 17
CAB FEATURES........................................................................................... 18
SERVICE PARTS .................................................................................... 19-22
OPTIONAL ACCESSORIES ......................................................................... 23
TORQUE SPECIFICATIONS ................................................................... 24-25

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Curtis cabs feature an assembly of parts designed for your vehicle which require adjustment
and alignment of components to accommodate vehicle variations and provide proper weather
protection. For accurate installation, proper operation, and years of satisfaction, please read
and understand the installation and owner’s manual fully prior to installing the cab.
From all of us at Curtis, we thank you for choosing our product.
HELPFUL HINTS:
•Refer to parts diagram found in the service parts section of this manual to help identify parts during the assembly process.
•To assist with the cab installation, leave all fasteners loose for later adjustment unless otherwise specified.
•Read and understand all instructions before beginning.
•Apply a silicone sealant to seal any minor gaps that may occur due to vehicle variations.
•Use caution to avoid damaging the factory installed threaded inserts or weld nuts. Begin the thread engagement by hand to
avoid or correct potential cross threading.
•Make sure the areas where the supplied self-adhesive hook Velcro and seals will be applied are clean, dry, and at room
temperature for best adhesion.
•Before installing parts with factory installed rubber, make sure the rubber is fully installed onto the parts for proper fit and
sealing.
driver and passenger.
Curtis accessory weights are listed in product
add additional weight to the base vehicle. All
Curtis Cabs, blades and general accessories
ADDED
WEIGHT
brochures. Deduct the accessory's total weight
from the vehicle's rated capacity and never
exceed the vehicle's rated capacity including
Exposure to Carbon Monoxide
can Cause illness, serious injury or
death. Never operate vehicle if suspicious of Carbon Monox-
ide. Inspect exhaust system for leaks monthly. Leaks can
result from loose connections, corrosion, cracks or other
damage to the exhaust manifold. If leaks are found, repair or
replace exhaust system. Do not use vehicle until repair or
replacement is complete.
•Set of Standard and Metric Sockets (Deep & Shallow, 3/8” Drive)
•3/8” Drive Ratchet with Extension
•Torque Wrench
•Set of Standard and Metric Open-End Wrenches
•Set of Standard and Metric Allen Wrenches
•#2 and #3 Phillips Head Screwdrivers
•Flat Head Screw Driver
•Body Clip Removal Tool or Needle Nose Pliers
•Coolant Drain Pan
•Pipe Dope (Not Teflon Tape)
•Drill/Driver
•#2 and #3 Phillips Head Bit
•#2 Square Drive bit
•Utility Knife
•Pair of Scissors
•Shears
•Grease
•Silicone Sealant
•Tape Measure
•China Marker or other Non-Permanent Marker
•Snips
•Plastic Putty Knife
•Isopropyl Alcohol
WARNINGS, TIPS, & REQUIRED TOOLS
TOOLS REQUIRED:
GENERAL INFORMATION BEFORE YOU START
California Health and Safety Proposition 65 Warning: This product may contain chemi-
cals known to the state of California to cause cancer and birth defects or other reproductive harm.

CAB INSTALLATION
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STEP 1: (VEHICLE PREP)
1.1 Remove the negative battery terminal with the cam
lever. Remove and set aside the nut from the positive
battery terminal stud. See Figure 1.1.
Tools required
10mm Wrench or Socket
1.2 Remove and set aside the toolbox and its fasteners.
See figure 1.2.
Tools required
17mm Wrench or Shallow Socket
1.3 Remove and discard the fender mounted grab handle
along with its fasteners. See Figure 1.3.
Tools required
12mm Wrench or Socket
1.4 Remove and discard the shin guards and their mounting
fasteners found on either side of the tractor at the front
of the floorboard. See Figure 1.4.
Tools required
12mm Wrench and Socket
1.5 Free up and fold forward the rear portion of the
floorboard mat. Expose the PTO lever guide plate bolts
and area around the gas pedal. See Figure 1.5. NOTE:
It may be necessary to remove the loader control
cable cover plate from the right fender to lift the
floormat.
1.6 Remove and set aside the PTO lever guide plate and
(4) bolts securing it. See Figure 1.5.
Tools required
12mm Wrench or Socket
Fig. 1.3 (Fender Mounted Grab Handle)
Fig. 1.4 (Shin Guard - Right Side Shown)
Fig. 1.1 (Battery Terminals)
Fig. 1.2 (Tool Box)
Positive Battery Terminal Stud
Grab Handle
Shin Guard
Fig. 1.5 (Floorboard Mat, left)
Tool Box

CAB INSTALLATION
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STEP 2: (CAB SEALING)
2.1 Wipe underside of the previously removed PTO lever
guide plate with Isopropyl alcohol. Once dry, adhere the
supplied .2” wide x .15” tall sealing bulb around the guide,
between the welded-on standoffs. See Figure 2.1.
2.2 Reinstall the PTO lever guide on top of the vehicle’s
floorboard sandwiching the supplied rubber seal using the
(4) fasteners removed in step 1.6 on the previous page.
See Figure 2.2.
Tools required
12mm Wrench or Socket
2.3 Position the (2) 4” long supplied flex brushes to either side
of the forward shuttle pedal, centered along the pedal’s
travel. Secure each brush with (2) self-drilling screws
provided. See Figure 2.3.
Hardware Used Qty
#10 Self-Drilling Screw 4
Tools required
#2 Square Drive Bit & Driver
**Caution: Check for smooth and unobstructed pedal
operation prior to placing machine into service.**
2.4 Wipe area around the fender mounted grab handle
fastener holes removed in step 1.3 on the previous page
with Isopropyl alcohol. Once dry, adhere a supplied red
circular decal over each hole.
2.5 With the seat in the forward most position, using Isopropyl
alcohol, wipe the top of the cross brace and up each
fender at approx. 30 degrees from vertical. Once dry,
adhere the supplied 1/2” x 916” foam weather seal as
shown in Figure 2.5.
2.6 Cut supplied adhesive Velcro to fit around 3-point lever
seal, leaving release paper in place. Wipe area directly
around the 3-point raise and lower lever with Isopropyl
alcohol. Once dry, position the supplied 3-point lever seal
around lever. Fit in place, remove release paper from
adhesive Velcro and adhere in place. See Figure 2.6.
Fig. 2.2 (PTO Lever Guide & Seal)
Fig. 2.1 (Guide Plate with Sealing Bulb Adhered)
Fig. 2.3 (Flex Brush Orientation)
Fig. 2.5 (Foam Weather Seal Orientation)
Fig. 2.6 (3-Point Raise & Lower Lever Seal)
Foam Weather Seal

CAB INSTALLATION
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STEP 3: (FLOORBOARD BRACKETS)
3.1 Remove the left side lower fender bolt and reinstall
finger tight only with the supplied floorboard-to-fender
bracket as shown in Figure 3.1.
3.2 Repeat step 3.1 on the right side of the vehicle.
Tools required
12mm Wrench and Socket
Fig. 5.1 (Rear Panel to Toolbox Bracket)
Fig. 6.1 (Lower Rear Panel to Rear Mount Bracket)
STEP 6: (LOWER REAR PANEL)
6.1 Have an assistant, while kneeling in the tractor seat,
locate the lower rear panel between the fenders and
aligning the front of it with the fender cross brace. Push
down from the top, compressing the sealing bulb on the
lower rear panel and the foam weather seal previously
installed to the vehicle. Align slots in brackets and fasten
using the provided hardware. See Figure 6.1.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 2
Tools required
1/2” Socket or Wrench
If necessary, adjust assembly to be parallel with cross
brace and fully compress the seals on the fender cross
brace and retighten mounting bracket hardware.
Fig. 4.1 (Toolbox to Rear Panel Bracket)
Fig. 3.1 (Floorboard-to-Fender Bracket Orientation)
Lower Fender Bolt
Floorboard to Fender Bracket
STEP 4: (TOOLBOX TO REAR PANEL
BRACKET)
4.1 Reinstall the toolbox using the fasteners removed in step
1.2. Sandwich the supplied toolbox to rear panel bracket
between the toolbox and the OEM toolbox mount. Center
supplied bracket in slots and snug fasteners. See Figure
4.1.
Tools required
17mm Wrench or Shallow Socket
Toolbox to Rear Panel Bracket
STEP 5: (LOWER REAR PANEL PRE-
ASSEMBLY)
5.1 Locate the lower rear panel and rear panel to toolbox
bracket. Keeping the slots centered, snug components
together. See Figure 5.1.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 2
5/16” x 1” OD Fender Washer 2
5/16-18 Hex Lock Nut 2
Tools required
1/2” Socket & Wrench
5/16-18 Screw
5/16” Lock Nut
5/16-18 Screw
5/16” Fender Washer

CAB INSTALLATION
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STEP 7: (SIDE FRAMES - REAR LEGS)
7.1 With assistance, remove the pre-assembled left door
from the left side frame and set aside. Do not lose the
brass washers on the hinge pins.
7.2 Locate the left side rear leg and align lower edge of rear
leg with the lower edge of the side frame’s contour filler.
Secure rear leg to side frame with the supplied hardware
ensuring there is no gap at “A”. See figure 7.2.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 5
Tools required
1/2” Wrench or Socket
7.3 Install 1” bulb rubber to the side frame assembly; starting
at the floorboard, continuing on to the rear leg as shown
in Figure 7.3. Note: Ensure the bulb rubber’s grip is
fully seated along the entire length and cut to length.
7.4 With an assistant, position the side frame assembly up
onto the fender and rotate the front in. Install the front
side frame fasteners finger tight at this time. See Figure
7.4.
Hardware Used Qty
5/16-18 Hex Lock Nut 2
5/16-18 x 1” Hex Head Screw 2
Tools required
1/2” Wrench and Socket
7.5 Secure the rear portion of the side frame assembly finger
tight only. Side frame can be shifted forward or back
to help sealing at fender. See Figure 7.5.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 3
5/16-18 Hex Lock Nut 3
Tools required
1/2” Wrench and Socket
7.6 Repeat steps 7.1 thru 7.5 on the right side of tractor. See
Figure 7.6.
Fig. 7.2 (Side Frame to Rear Leg Orientation)
Fig. 7.4 (Front Side Frame Fasteners)
Fig. 7.3 (Side Frame - Rear Leg Sealing Bulb)
Fig. 7.5 (Rear Side Frame Fasteners)
Fig. 7.6 (Right Side Frame Fasteners)
Note: Right Side Frame’s
Floorboard Swings Into
This Opening. 5/16-18 Screw
5/16” Fender Washer
5/16” Lock Nut
Align Edges
Start Here On
Floorboard
Terminate Here
On Rear Leg
5/16” Lock Nuts
5/16-18 X 1” Screws
“A”

CAB INSTALLATION
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STEP 9: (COWL)
9.1 With an assistant, carefully lower the cowl assembly down
into place as shown. The polycarbonate side windows
mount to the outside surface of the front legs while upper
steel portion of the cowl fastens to the inboard side of the
side frames. See Figures 9.1a & 9.1b.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 10
5/16” Nylon Washers 4
5/16-18 Hex Lock Nut 4
Tools required
1/2” Wrench and Socket
9.2 Install the left side cowl bracket. See figure 9.2.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 3
5/16” Nylon Washers 2
5/16-18 Hex Lock Nut 2
Tools required
1/2” Wrench and Socket
9.3 Repeat step 9.2 on the right side of tractor.
Fig. 8.1 (ROPS Bracket to Rear Leg Orientation)
Fig. 9.2 (Cowl Bracket Orientation)
Fig. 10.1 (Windshield Support)
STEP 8: (ROPS BRACKET & CLAMPS)
8.1 Assemble the ROPS bracket to the rear leg as shown in
Figure 8.1.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 2
5/16-18 Hex Lock Nut 2
Tools required
1/2” Wrench and Socket
8.2 Position the ROPS clamp around the ROPS and fasten it
to the previously installed ROPS bracket as shown in
Figure 8.1.
Hardware Used Qty
5/16-18 x 3/4” Hex Head Screw 4
5/16-18 Hex Lock Nut 4
Tools required
1/2” Wrench and Socket
8.3 Repeat steps 8.1 and 8.2 on the right side of tractor.
Fig. 9.1a & 9.1b (Cowl Fasteners)
STEP 10: (WINDSHIELD SUPPORT)
10.1 Position the windshield support across the side frames
and install the front fasteners, snug only at this time. See
Figure 10.1.
Hardware Used Qty
5/16-18 x 1” Hex Head Screw 2
5/16-18 Hex Nut 2
Tools required
1/2” Wrench and Socket
5/16-18 Screw
5/16” Nylon Washer
5/16” Lock Nut
5/16” Lock Nut
5/16-18 Screw
5/16” Lock Nut
5/16-18 Screw
5/16” Nylon Washer
5/16-18 Screw
5/16” Lock Nut
5/16-18 Screw
ROPS Bracket
ROPS Clamp

CAB INSTALLATION
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Fig. 11.1 (Attach Main Harness To Cowl)
Fig. 11.4 (Bottom shown, top similar)
STEP 11: (CAB WIRING)
11.1 Attach the main power wire harness to the top of the cowl
cross brace, about 6” from the end of the windshield
wiper motor connector, using a P-clip and hardware. The
connector end should be outside the cab with the rest of
the harness on the inside. See Figure 11.1.
Hardware Used Qty
#10-32 x 1/2” Pan Head Screw 1
#10-32 Hex lock Nut 1
Tools required
#2 Phillips Screw Driver
3/8” Wrench or Socket.
11.2 Snap in the heater switch and connect the wire harness.
11.3 Attach the harness to the under side of the cowl with the
supplied P-clamp & hardware listed below. See Figure
11.1.
Hardware Used Qty
#10-32 x 1/2” Pan Head Screw 1
#10-32 Hex lock Nut 1
Tools required
#2 Phillips Screw Driver
3/8” Wrench or Socket.
11.4 Run the wire harness down along the right side trim ring,
fastening with the (3) factory installed wire ties and
through the 11/16” hole in the right side cowl window.
See Figure 11.4.
11.5 Locate the supplied 7/16” I.D. rubber grommet. Slice the
grommet in order to wrap it over the wire harness and
then install into the 11/16” cowl hole.
11.6 Run the harness to the battery compartment on the right
side of vehicle under the floorboard. Make sure that
wires will not be cut or pinched routing to battery.
11.7 Locate the fuse harness (WH-GF). Make certain the fuse
is installed in the fuse holder. Connect the fuse harness
to the main power harness via the bullet connectors.
Install the ring terminal found on the fuse harness to the
positive battery terminal stud and secure using the nut
which was removed in step 1.1. See Figure 11.7.
11.8 Install the ring terminal of the main power wire harness to
the negative battery terminal stud. Do not reinstall the
negative battery terminal at this time. Coil the slack in
the power harness and secure with a wire tie. See Figure
11.7. Double check that the wires are not pinched or
near sharp or hot surfaces.
NOTE: At the installer’s discretion, wiring for accessories
may also be installed at this time.
Fig. 11.7 (Power Supply Connections)
P-Clamp
P-Clamps on Underside of
Cross Brace
Wire Tie

CAB INSTALLATION
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STEP 12: (WINDSHIELD ASSMBLY)
12.1 With assistance, set the windshield up to the side
frames and secure it to the windshield support using the
hinge spacers and hardware. See Figure 12.1. Leave
hardware loose.
Hardware Used Qty
5/16-18 x 1-1/2” Flat Head Screw 4
5/16-18 Hex Lock Nut 4
Tools required
#3 Phillips screw driver
½” Wrench or Socket.
12.2 Secure the windshield latches to the side frames with
the latches open, and tighten latch hardware. See
Figure 12.2.
Hardware Used Qty
¼-20 x 5/8” Hex Head Screw 4
¼-20 Hex Lock Nut 4
Tools required
3/8” Wrench or Socket
7/16” Wrench or Socket
12.3 Close the windshield while lifting up on the bottom
edge. Tighten hinge hardware.
Caution: The windshield hinges are plastic
components. Do not overtighten the flat head
screws. Torque to 7 ft.-lbs. max.
12.4 Ensure the windshield latches function properly and the
windshield pivots open.
12.5 Remove the over-tightening caution decal from the top
of the windshield. See Figure 12.5.
Fig. 12.5 (Decal Removal)
Fig. 13.1 (Windshield Wiper Motor)
Over Tightening Decal
Hex Nut
Plastic Washer
Rubber Washer
Large Collared Bushing
(Inside)
1/4” Int. Tooth Lock Washer
Small Collared
Bushing (Inside)
Rubber Washer
Cap
Nut
Steel
Washer
Fig. 12.1 (Windshield Assembly)
5/16-18 Flat
Head Screws
5/16” Lock Nuts
Fig. 12.2 (Secure Windshield Latches)
1/4-20 x 5/8” Screws
1/4-20 Lock Nuts
STEP 13: (WINDSHIELD WIPER
MOTOR)
13.1 Mount the wiper motor to the windshield. See Figure
13.1. Make sure the wires are above the wiper motor
shaft to prevent pinching the wires when the windshield
is opened and closed, then connect to the wire harness.
NOTE: Do not install the wiper arm and blade at this time.
Once all the wiring is complete and power is restored, it
can be turned on and off to ensure that the wiper arm
will be parked in the correct position once it is attached
at a later step.
13.2 Re-check the windshield pop-out function. The wiper
motor should easily clear the cowl, but if not, loosen the
windshield hinges and raise the windshield to gain some
clearance.
1/4-20 Screw