PR RACING PRS1 FM V4R User manual

www.pr-rc.com
4
ITEM NO:75400056
1:10 Scale 2WD Off Road Electric Competition Buggy Kit

Specifications
• Length: 411mm
• Width: 248mm
• Height: 145mm
• Wheelbase: 280mm
• Front track: 248mm
• Rear track: 248mm
• Weight:1420-1510g
• 12.8mm big-bore oil-filled shocks
• 3 Gear box with 3-gear transmission
• Metal gear differential
• Dual pad slipper clutch
• Complete sealed ball beraring set
• 12mm hex fit wheels
• Metric socket screw (Hex Screws)
Items Required To Complete
•Metric 1.5mm, 2.0mm hex tools
• Metric 5.5mm, 7.0mm nut driver
• 2 Channel surface radio system (Minimum)
• 1/10 ESC, motor & pinion gear
• High Speed Servo
• 2S LiPo shorty battery & compatible Lipo charger
• Polycarbonate paint for bodies
•/10 Buggy tires, inserts and CA glu
Manual connection

#75400056
PR S1 V4 R (FM) 1/10 Electric 2WD Off Road Buggy PRO Kit (Gear Diff Version)
PR V4R FM保留了V3R的穩定元素，在V4R這版本中我們加入了更多扭動/重心轉移及快速調整的設計理念。
首先，電池的固定改為側向，完整釋放更多的扭動效應，但也保留了V3R的電池固定方式，有二種方式可供選擇。
再來藉由可調電池前後位置，讓車體重心的調整更加多元，快速改變前後重量比。
至於快速調整的部份，則是把重點放在後齒輪箱，以往更換差速器需要拆除許多的螺絲，V4R則改為快拆式設計，
針對不同場地快速更換差速器。底盤選用3mm厚度，並搭配更多的鏤空加工，
不僅減少了重量更讓後齒輪箱及馬達重心再次下降。
透過更精確的計算，大幅度的降低了整體的重心並更加前移。
PR V4R FM承襲了前一代的穩定性並加以優化。為了讓一直以來的支持者能沿續更多的零件。
而不是一年就必須更換一個新的車種，又要能找出更好的設計方向。雖然花了許多時間，但我們實現了∼
PR V4R FM retains the main elements of the V3R. With the V4R,
we have added more chassis flex options and quick adjustment design concepts.
Battery Mounting: A change was made to the mounting arm system, which increase chassis flex and
also keeps the battery retainment method of the V3R. So using the V3R battery retainer plates, chassis
flex can be decreased if needed.
Battery Placement: The front to rear weight can be quickly changed by moving the battery pack forward
or back with ease.
Quick adjustments: The new quick access gearbox allows for faster adjustments of gear diff and easy
maintenance of ball diffs.
Chassis Design: The 3mm thick chassis has more CNC machining done to create a lighter part along
with moving the the car’s center of gravity to a more optimized position.
The PR V4R FM inherits the stability of the previous generation and builds on it. For those with a spare
parts bank already, you will be happy to know that instead of a completely new model, we have only
redesigned the parts that needed to be. This makes it very easy to upgrade your previous model with
the latest parts.

03-06
06-11
12-18
Rear Shock Stay
Rear Gear Box
Transmission Assembly
Gear Differential
19-25
Front Suspension
Rear Suspension
Motor
Battery Plate
Tires
Body & Wheels
01
26
27
Rear Hud & CVA
Rear Hud (L&R)
Rear Suspension
Rear Shock Stay
Rear Suspension
Rear Upper Rod Turnbuckle Assembly
01
Chassis Guard Installation
Steering Bellcranks
Steering Servo
Front Suspension
Front Spindle (L&R) Side
Front Suspension (L&R)
Front Upper Turnbuckle Assembly
Turnbuckle Assembly-Steering Rod
Front & Rear Shock Assembly
& OPTIONAL PRTS

Needle Nose Pliers Grease
Screw Cement
Round Cutter & Sander
Sharp Hobby Knife
Hex Wrench
1.5mm
2.0mm
Ball Differential
Grease
Ware Cutters
SP Knife Edge Reamer
A new battery must be charged before it is used. Refer to the charger instruction manual for charging.
Set up the radio control system as indicated below.
Battery
Transmitter
Off
On
Charger
Eletronic Speed
Controller
Receiver
Servo
Install batteries.(Transmitter)
Extend the antenna.(Transmitter)
Connect the battery to the ESC.
Extend the antenna.(Receiver)
Switch on both the transmitter and receiver.
Make sure the servos are in command.
Switch off both the transmitter
and receiver.
Retract the antrnna.
(Transmitter)
Center the trims.
Off
On
Off
On
Silicon Diff Oil
Cross Wrench
5.0mm-5.5mm
7.0mm
Std. Short
Low Short
(Low Profile Servo)
6.5-17.5t
02
HEALTH WARNING
This model is a high performance radio controlled racing product that is
designed for use on R/C car race tracks. If it is misused it could cause injury
to the operator or others. Many of the items in this kit are small enough to be
accidentally swallowed; therefore, it is not suitable for young children. All
items, inclusive of liquids, contained in this kit are not intended for human
consumption. Rotating parts of the car may cause injury if not handled with
care.

Part Bags used. Assemble left and right
sides the same way.
Chassis Guard Installation
A1
Apply threadlocker (screw cement)
(screw cement)
BAG
A
Assemble in the
specified order
4
5
6
7
10
82400016
M3x6mm
82400026
M3x8mm
6
71400697
3mm
71000051
2023
99400076
Foam(1or3mm)
68400016
76500066
3x6mm
3x8mm
3x8mm
3x6mm
3x6mm
3x8mm
03

Steering Bellcranks
A2
A3
BAG
A
BAG
A
04
Steering Bellcranks
Apply threadlocker (screw cement)
(screw cement)
4
68430026
M4.8x3mm
66400756
5x8x2.5mm Ball Bearing
4
4.8x3mm
2
5x8x2.5mm Ball Bearing
68430036 M4.8x6mm
80400046
85430026 Shim 3x10x0.8mm
4.8x6mm
3x10mm
3x10x0.8mm
2
2
1
66430366
00430025
68480036 68480036
3x10mm
5x8x2.5mm Ball Bearing
00430025
Steering Knuckle Bushing 3x6mm
66430366
Ackerman Aluminium
2
1
68480036
Steering Linkage
1
Assemble in the
specified order
Responsive
Stable
Front
Front
hole 1
hole 2

Steering Servo
A4
Steering Servo
A5
Servo Rod
BAG
A
BAG
A
87400096
M3x8mm Set Screw
1
1
82400106 M3x10mm
1
4.8x6mm
66402466(F/S)
66400066
3x10mm
1
83400106 M3 Nut
29mm
68430086
M4.8mmx6mm Ball Studs
66400066
3x8mm
M3 Nut
1
66400036
Servo horns
2
66400066
Rod End
Must be purchased separately. Apply threadlocker (screw cement)
(screw cement)
Must be purchased
separately.
Std. Profile Servo
3x8mm
Shim3x8x0.5mm
85000010
Shim
3x8x0.5mm
Shim
3x8x0.5mm
80400036
M3x8mm
4
4
3x8mm
66480936
(screw cement)
Low Profile Servo
05
66480936
Aluminium Servo Mount
2
90°
When installing the servo on the
chassis, please confirm the neutral
position of the servo first.
伺服機要安裝在底盤時，請先確認
伺服機的中立位置。
Stock
Modify

Steering Servo
A6
Front Suspension
B1
BAG
A
BAG
B
82400016
M3x6mm
2
3x6mm
Apply threadlocker (screw cement)
(screw cement)
4
80400036 M3x8mm
2
2
79400036 3x36.8mm Pin
3x36.8mm Pin
3x8mm 66400036
66000020
69400156
67400106
69400156
Front Lower Gull Wishbone
69400156
Front Wishbone
69400146
06
66400036
66000020
67400106
Lower Swing Arm Mount
1
1
1
Stable
Responsive
We strongly recommend installing the steering servo now
as shown in Step A6 before proceeding with Step B1.
請先完成頁面A6(伺服機)在底盤上的安裝.
再前往B1頁面進行安裝.
Caster 3 Degree

Front Spindle (L&R) Side
B2
80400186
M2.5x6mm
4
68430036
M4.8x6mm
66401686
Steering Screw Stepped
4
2
2.5x6mm
4.8x6mm
89430010
5x10x4mm Ball Bearing
5x10x4mm
66401686
4
4
83400106-M3 Lock Nut
2
66480856
66481336
Shim
3x8x0.15mm
85440320
Shim 3x8x0.15mm
4.8x10mm
M3 Lock Nut
68430076
M4.8x10mm
R
L
x
UNUSED
x
Steering Plates installation
2
3x8mm
2
80400036
M3x8mm
5x10x4mm
66401686
Shim
3x8x0.15mm
66401876
68410066
Plastic 4mm
Apply threadlocker (screw cement)
66481336
4
5
Stable
Shim
6
7
8
9
10
BAG
B
Sensitive
66480856
66401876
2
1pr
1pr
4
2
66481336
Responsive
Responsive UNUSED
85440180
0.5mm
71400699
07
71400699
85440180 Shim 5x8x0.5mm
(screw cement)
85440180
0.5 mm Shim (2)
85440180
0.5 mm Shim (2)
Do not over-tighten this
screw. They should be
/tight but still allow the
parts to move freely
Stable Stable
Corner Speed
For the threading of plastic
parts... "Pre-thread holes
before installing
steering hub."
IMPORTANT
Do not over-tighten this
screw. They should be
/tight but still allow the
parts to move freely

Front Shock Stay
B5
B4 Front Shock Stay
Part Bags used.
B3 Front Suspension (L&R)
Assemble left and right
sides the same way.
3x8mm
4.8x8mm
66481176
4
08
67400106
Do not over tighten
Do not over tighten
Shim
3x8x0.15mm
1.98mm
2.5x4mm
(5.5mm)
3x29.80mm
85440311
2mm
3x14mm
3x10mm
3x8mm
94500015
BAG
B
BAG
B
80400016
M2.5x4mm(5.5mm)
79400026
3x29.80mm
85440320
Shim 3x8x0.15mm
2
2
2
68430046 M4.8x8mm
80400036 M3x8mm
85440311 3x6x2mm
Silver Aluminum Spacer
82400046 M3x14mm
4
4
2
2
82400026 M3x8mm
2
66481176
1pr
1
67400106
1
80400046 M3x10mm
4
94500015
IMPORTANT
Use this optional shim if there is
excessive play but the assembly
should still move freely.
依據鬆緊，請加它或不加它。

Part Bags used.
BAG
One side is reverse threaded.
36mm Turnbuckle
66400346
2
BAG
B
09
One side is reverse threaded.
B6 Turnbuckle Assembly-Steering Rod
BAG
B
Front Upper Turnbuckle Assembly
Thread and unthread the turnbuckle
into the plastic rod end a few times to
allow easier adjustment after assembly.
IMPORTANT
B5
Note the direction.
36mm Turnbuckle
66400346
One side is reverse threaded.
2
19.3mm
31.3mm
L
R
82400046 M3x14mm
2
Chassis Guard Installation
28.2mm Rod End
66400066
4
66400066
3x14mm
31.3mm Rod End
66400066
2
L
R
66400066
66400066
1
1
19.3mm
31.3mm
17.2mm
28.2mm 28.2mm
66400066
L
R
66400066

Part Bags used.
Rear Hub & CVA
B7
Assemble left and right
sides the same way.
70220018
-3
70220018-1
70220018
-2
70220018-1 70220018-1
70220018-1
BAG
B
10
Do not over tighten
IMPORTANT
Do not over
tighten
70220018
-3
4
Rear Hub (L&R)
B8
66430200
2
2
4
2.5x4mm(5.5mm)
79480046
3x50.8mm
79400036
3x36.8mm
80400016
M2.5x4mm(5.5mm)
69400146
2.5x4mm(5.5mm)
3x36.8mm
3x50.8mm 66430200
3x6.6x1mm
1mm
1.1mm
BAG
B
68430066 M4.8x5mm
89430020
5x13x4mm Ball Bearing
89430030
10x15x4mm Ball Bearing
2
2
2
4
79400086 2x9.8mm
66401096
2x9.8mm
3x14mm
5x13x4mm
10x15x4mm
87400066 M2x5mm
2x9.8mm
4
19460016
High Pressure Grease
80400056 M3x14mm
4.8X5mm
4
66401106
67mm
71400701
68440095
(Kit)
2x5mm
6
7
8
9
10
5
Stable
Corner Speed
Responsive
Neutral
Corner Speed
Stable Responsive
Suspension Insert Hub Plate
14.2mm 12.8mm
69400176
3x7x2mm
Assemble in the
specified order
68440095 (Kit)
66401096
2
2
2
71400701
2
IN B1 BAG
Remnant cut off
L
L
LL
Initial Setting
Initial Setting
Front

Part Bags used.
B9
Assemble in the
specified order
BAG
B
11
Rear Suspension
Apply threadlocker (screw cement)
82400026
M3X8mm
66430200
1mm
1.1mm
(screw cement)
3x8mm
69400176
94500053/RF
3x8mm
4
5
3mm
1.1mm
or
1.0mm
Wishbone Shim selection
77500156
70220019/RR
94500053/RF
1
1
70220019/RR
4
+0.5
+1.5
SQUAT
RF RR
0
+2
+2.5
Use combinations of these 3 inserts
to adjust ANTI- SQUAT and TOE IN
ANTI-SQUAT degrees
ANTI-SQUAT +1 degree
+2.5
+2
TOE
RF RR
+3
+1.5
+1
TOE IN degrees
Initial Setting TOE IN SQUAT
+2.5 +1.5

Part Bags used. Apply oil. Assemble in the
specified order
BAG
C
12
4
Gear Differential
C1
Silicone oil
Low Traction
Medium High Traction
Super High Traction
3000cst
5000cst
7000cst
Silicone oil
4x10x
0.15mm
66480356
66480336
14T
66480336
9T
66480366
74480036
66481366
2.5x8mm
66481366
O-ring
5x8x0.8
E Buckle
66480336 14T
74480036
5
19460016
High
Pressure Grease
E-Clip Installation
5x8x0.8mm Shim
85440170
2
2
4x10x0.15mm Shim
85440160
4
3.5mm
85400016
80000021
M2.5x8mm
4
2
2
4
2
66480356
66480336 14T
66480336 9T
31450016 O-ring
66481366
2
1
1
74480036
66480366
O-ring
E Buckle
E-Clip
5x8x0.8
7
11
9
6
8
10
Or fill to the top
of the cross pins
(max 80%)
1
2
3
4
Finish tightening in
this order.
89430030
10x15x4mm Ball Bearing
2
3
4
2
19460016
High
Pressure Grease
Including 10x15mm Bearing (1Pcs)

Part Bags used.
Assemble in the
specified order
BAG
C
13
Transmission Assembly
C2.1
7
89430010
5x10x4mm Ball Bearing
10x15x4mm
80400066
M3x20mm
80400196
M3x18mm
66480236-5x18mm
Aluminium Idler Shaft
5
1
R
L
Carpet / High Traction Dirt / Low Traction
Bevel Drive Gear & Differential
Height Adjustment (Initial Setting)
Bevel Drive Gear & Differential
Height Adjustment (Initial Setting)
4
1
66480646 20T
1
1
70220020
70220020
4
6
5
66402016
5x10x4mm 5x10x4mm 5x10x4mm 3x18mm
66480236
L
R
3x20mm
66480646 20T
70220021
70220021
MAX 27.9mm
1
70220020
70220020
70220020
70220021
1
8
NOTE ORIENTATION
Numbers must have
the same orientation
on each side
NOTE ORIENTATION
Numbers must have
the same orientation
on each side
66402086
34T Aluminium Idler Gear
1
Tighten the screws equally
but do NOT
tighten them completely.
66402086
34T Aluminium
Idler Gear
Modify
66402016
34T Plastic
Idler Gear
Stock
66402016
34T Plastic Idler Gear

Part Bags used.
Transmission Assembly
C2.2
Assemble in the
specified order
BAG
C
14
Tighten the screws equally
but do NOT
tighten them completely.
80400066
M3x20mm
1
80400057
M3x15mm
4
1
M3x3mm Set Screw
87400016
1
Sway Bar Stop Collar
75400017
4
70220020
82400066 M2.5x8mm
1
70220011 / 1.3mm
1
11
3x15mm
70220020
2.5x8mm
12
3x20mm
9
M3x3mm Set Screw
75400017
70220011 / 1.3mm
10
19460016
High
Pressure Grease
A = B
IMPORTANT
Apply oil.

(A)
(A)
Transmission Assembly
C3
BAG
C
15
82400036
M3x12mm
3
3x12mm 7022002094500036
83400036-M4 Lock Nut
66402696
S1 support piece
66402666
S1 Slipper Spring
1
1
1
M4
Lock Nut
66402696
66402666
66402456
66480596
77T 74430016
66480306
11mm
Assemble in the
specified order
1
94500036
PRS1V4
Carbon Motor Plate
66402456
Vented Slipper Plate
66480596
77T
74430016
Vented Slipper Plates
5
4
66480306
11mm
Slipper
Pad
Part Bags used.
0.5-1.0mm
Initial Setting
Tighten the lock nut for
the slipper spring to
0mm for first drive.
Adjust according to track
conditions and motor turn.
2
1
1
1
Assembly Video
68430016
19mm
Slipper Pad
Slipper Pad
Carpet / High Traction Dirt / Low Traction
2

Rear Shock Stay
C4
4
BAG
C
16
Part Bags used.
68430046
M4.8x8mm Ball Studs
80400046
M3x10mm
85440311
3x6.0x2mm Aluminum Spacer
8
2
24.8x8mm
4.8x8mm
3x6.0x2mm
3x6.0x2mm
3x10mm
3x10mm
68480106
94500013
Assemble in the
specified order
94500013
1
68480106
2
Need
3X12mm Screw
82400036
M3x12mm
2

Rear Gear Box
C5
Anti-Roll bar Balls
C6
BAG
C
BAG
C
17 Part Bags used.
3x8mm
Assemble in the
specified order
80400036
M3x8mm
2
85440301
3x6x0.5mm Shims
2Must be purchased separately.
Must be purchased separately.
2
85440240
M3 Antislip Shims
M3x8mm
3x6x0.5mm Shims
M3 Antislip Shims
M3x6mm Set Screw
78400026
2
3x6mm
Set Screw
82400026 M3x8mm
6
Adjust the M3x6 Set Screws
and stopper to
remove any gap
but allow the sway bar
to swivel smoothly
齒輪箱裝人底盤時 請先完成馬達安裝。
Note: complete installation of the motor to the
gearbox before installing gearbox to chassis.
19460016
High
Pressure Grease
Must be purchased separately.