RHOX 900 Series User manual

Caution: Please read through the instructions carefully. Installer is responsible
for damage if instructions are not followed properly. Look behind each drill or
cut location BEFORE YOU DRILL OR CUT. Installer is responsible for damage
(i.e. drilling/cutting into a wiring harness, battery, fuel tank etc.). Extra installers
will be helpful in some parts of the installation. Refer to vehicle’s maintenance
manual for torqueing specifications on reused hardware.
SEAT-921
Club Car DS
RHOX 900 Series Seat Box Kit
Installation Instructions
Contents of SEAT-921 Seat Box Kit:
a (2 ea.) Front Seat Back Support Brackets
b (2 ea.) Vertical Support Brackets
c (1 ea.) Horizontal Support Bracket, Passenger Side
d (1 ea.) Horizontal Support Bracket, Driver Side
e (1 ea.) Utility Box
f (2 ea.) Rear Seat Back Brackets
g (1 ea.) Footplate
h (2 ea.) Handrails
i (2 ea.) Handrail Extensions
j (2 ea.) Footplate Support Brackets
k (1 ea.) Box of Hardware (Contents on Next Page)

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* Hardware is pre-installed on box if not in bags.
Tools Needed For Installation
Sockets and Open Ended Wrenches: 10mm, 7/16”, 1/2”, 13mm, 17mm;
Phillips Screwdriver, Rubber Mallet (Optional)
Contents of SEAT-921 Hardware Kit Bag #1 #2 #3 #4 #5
aM10 x 80 Hex Head Bolts 2
bM10 x 35 Hex Head Bolts 2
cM10 x 30 Hex Head Bolts 4
dM10 x 60 Phillips Head Countersunk Screws 2
eM10 Flat Washers 12 4
fM10 Nylock Nuts 62
gM8 x 25 Hex Head Bolts 4*
hM8 Flat Washers 28*
iM8 Nylock Nuts 4
j5/16-18 x 1.5” Hex Head Bolts 2
k5/16” Fender Washers 2
l1/4-20 x 2” Hex Head Bolts 4
m1/4-20 x 1” Hex Head Bolts 4
n1/4-20 Flat Washers 12
o1/4-20 Nylock Nuts 4
p6mm x 25 Hex Head Bolts 4
q6mm x 15 Phillips Head Countersunk Screws 4*
r6mm Lock Washers 4
s6mm Flat Washers 4

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Installation Preparation
1. Engage parking brake.
2. Turn key OFF.
3. Electric Carts Only: Place Tow/Run Switch in
Tow.
4. Remove top (black arrows).
5. Remove rear struts (red arrows).
6. Remove the front seat back cushion(s) by hand. Retain hardware.
DS Old Style
Rear Strut (Driver Side)
DS New Style
(Driver Side)
DS Old Style
(Driver Side Seat Back)
DS New Style
Rear Strut (Driver Side)

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7. Remove access
panel. Retain
hardware.
8. Remove front seat back supports and sweater
basket assembly. Retain hardware.
9. Remove rear bumper. Retain
hardware and bumper. Discard
mounting plate (blue arrows).
Rear Seat Kit Installation
1. Loosely install the vertical support brackets to
the bumper mounts and bumper using the
Original Bolts, Nuts and (2) 8mm Flat Washers
(Bag #1).
(Driver Side, DS New Style)

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2. Install the new front seat back support brackets where the original brackets were
installed. Mount the front most portion using the Original Hardware (black arrows).
3. Place the horizontal supports under the seat back brackets as shown. Fasten them
to the vertical support brackets using (2) M10 x 30 Hex Head Bolts (4) Flat Washers
and (2) Nylock Nuts (blue arrows, Bag #2).
4. Fasten the horizontal supports and the front seat supports to the rear body
using (2) 5/16”-18 x 1.5” Hex Head Bolts, (2) Fender Washers and (2) Original Nuts
removed earlier (red arrows, Bag #1).
5. Reinstall the access panel using the Original Hardware.
6. Loosely fasten the footplate to the vertical support brackets using (2) M10 x 30 Hex
Head Bolts, (4) Flat Washers and (2) Nylock Nuts (Bag #2).

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7. Loosely fasten the rear seat back
brackets to the rear seat back
cushion using (4) M6 x 25
Hex Head Bolts, (4) Lock
Washers and (4) Flat Washers
(black arrows, Bag #5).
8. Loosely fasten the seat back
assembly to the front of the
utility box using (4) M8 x 25 Hex
Head Bolts and (4) Flat Washers
(red arrows, Bag #4).
NOTE: Hardware may be
pre-installed on box if not in Bag.
9. Tighten the hardware left loose in
Steps 7 and 8.
10. Place the seat box assembly on top of the horizontal support brackets. Loosely
fasten the box to the brackets using (4) M8 Flat Washers and (4) M8 Nylock Nuts
(Bag #4).
11. Place the handrails and handrail extensions through the openings in the box.

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12. Loosely fasten the front portion of
the handrails to the box using
(2) M10 x 35 Hex Head Bolts and
(2) Flat Washers (red arrow, Bag #2).
Do not overtighten .
13. Loosely fasten the handrail extensions
to the handrails and the box using (2)
M10 x 60 Phillips Head Countersunk
Screws, (2) Flat Washers and
(2) Nylock Nuts (blue arrow, Bag #2).
Do not overtighten .
14. Slide the footplate support brackets
over the handrail extensions until the
holes align. The brackets will cradle
the footplate. Loosely fasten the
brackets and handrail extensions to
the footplate using (2) M10 x 80 Hex
Head Bolts (4) Flat Washers and (2)
Nylock Nuts (black arrow, Bag #3).
15. Install the front seat back cushion
using (4) 1/4”-20 x 1” Hex Head Bolts
and (4) Flat Washers (Bag #1).
16. Slide the rear seat bottom onto the underside of the utility box deck until it clicks
into place on the locking tabs (yellow).
17. Lock the seat bottom into place with the (2) small retaining plates and (4) M6 x 15
Phillips Head Countersunk Screws (Bag #5 or Installed on Box).

18. DS New Style Only: If
reinstalling the OE rear
struts, install them to the
front seat back supports
using (4) 1/4-20 x 2”
Hex Head Bolts,
(4) 1/4-20 Nylock Nuts
and (8) 1/4” Flat Washers
(Bag #1, black arrows).
19. DS Old Style or Extended
Tops: If installing struts for
an old style DS or an
extended top, remove the
end caps from the front
corners of the utility box
(red arrow).
20. DS Old Style or Extended Tops: Insert the
struts inside of the utility box where the end
caps were removed. Fasten the struts to the
box using the hardware preinstalled on the box.
TOP-0108 rear struts are shown.
NOTE: RHOX 88” Tops require TOP-0108 rear
struts. DS Old Style requires TOP-0101 rear
struts (modification may be required).
21. Reinstall top using Original Hardware (if
applicable).
22. Tighten all hardware.
This completes the installation of your
RHOX 900 Series Seat Box Kit. Please enjoy safely!
Scan QR code or use the link below to
view the installation video.
https://vimeo.com/user39935056
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