Full Text Searchable PDF User Manual
HELPFUL HINTS
✔
Avoid working over a deep pile carpet. If you drop a small part or screw,
it may be difficult to find.
✔
Place a mat or towel over your work area. This will prevent parts from rolling off and will protect the work surface.
✔
Avoid running the car in cold weather. The plastic and metal parts can become brittle at low temperatures. In addition, grease and
oil become thick, causing premature wear and poor performance.
MAINTENANCE
BEFORE EACH RUN
✔
IMPORTANT: Check to make sure that all
screws are tight. Check that the servo
saver screw is fully tightened to ensure
that your Dromida DB4.18 tracks straight.
✔
Always check the condition of your
radio system batteries and replace if
necessary.
✔
Check to make sure that all of the
moving parts of the Dromida DB4.18
move freely and do not bind.
✔
Turn on the radio and make sure the
servo moves easily and in the proper
direction.
✔
Check for any broken or damaged
parts. Replace them before running the
Dromida DB4.18. Running the Dromida
DB4.18 with broken or damaged parts
could damage additional parts.
✔
Check to make sure that all wires are
properly connected.
AFTER EACH RUN
✔
Clean any debris from the chassis and
moving parts.
✔
Check for any broken or damaged parts.
Replace them before the next run.
✔
Disconnect and remove the battery
from the chassis.
AFTER EVERY 10 RUNS
✔
Check to make sure that the bearings
are free of dirt and debris, and roll
smoothly.
✔
Check the shocks for oil leakage.
✔
Check the tires to make sure they are
still properly glued to the rims.
ASSEMBLY AND MAINTENANCE GUIDE
HARDWARE CHART
2x10
MM FLAT HEAD SCREW
H
2x4
MM ROUND HEAD SCREW
C
2x8
MM FLAT HEAD SCREW
G
2x8
MM ROUND HEAD SCREW
E
2x10
MM ROUND HEAD SCREW
F
6x10
MM BALL BEARING
A
8x12
MM BALL BEARING
B
2x8
MM ROUND HEAD
SHOULDER SCREW
P
3x3
MM SET SCREW
Q
3
MM LOCK NUT
R
2.6x5
MM WASHER
S
3x6
MM WASHER
T
2x6
MM SELF-TAPPING
ROUND HEAD SCREW
X
2x12
MM SELF-TAPPING
ROUND HEAD SCREW
Z
2x15
MM SELF-TAPPING
ROUND HEAD SCREW
AA
2x5
MM SELF-TAPPING
ROUND HEAD SCREW
Y
2x14
MM FLAT HEAD SCREW
J
2.5x8
MM FLAT HEAD SCREW
K
2.5x8
MM SOCKET HEAD SCREW
L
2.5x14
MM SOCKET HEAD CAP SCREW
M
3x6
MM SOCKET HEAD SCREW
N
3x6
MM SELF-TAPPING
BUTTON HEAD SCREW
CC
3x8
MM SELF-TAPPING
BUTTON HEAD SCREW
DD
2.5x5
MM BUTTON HEAD
SCREW
BB
BODY CLIP
V
1.5
MM E-CLIP
U
ACTUAL SIZE
(WHEN PRINTED AT 100%)
™
31
33
32
33
30
32
G
G
B
G
G
B
34
GREASE
GREASE
GREASE
GREASE
NOTE DIRECTION
NOTE DIRECTION
2
2
1
H
H
H
H
1. DIFFERENTIAL ASSEMBLY
2. DIFFERENTIALS TO CHASSIS
3. STEERING ASSEMBLY
4. CENTER SHAFT
18
45
18
40
40
44
40
46
P
P
DO NOT OVERTIGHTEN
(WILL CAUSE BINDING)
DO NOT OVERTIGHTEN
(WILL CAUSE BINDING)
28
29
27
28
A
B
A
GREASE
GREASE
5. SHOCK TOWERS
7
3
8
71
12
8
40
3
7
40
40
40
11
G
G
E
E
E
V
V
E
NOTE DIFFERENCE
NOTE DIFFERENCE
N
N
T
K
Q
K
T
E
E
E
E
E
E
39
26
4
25
24
THREADLOCK
THREADLOCK
6. MOTOR MOUNT
7. FRONT SUSPENSION
8. REAR SUSPENSION
41
42
41
43
38
15
40
36
35
37
17
18
B
B
DO NOT OVERTIGHTEN
FULLY SEAT BEARINGS
DO NOT OVERTIGHTEN
9
40
L
C
H
40
13
14
H
L
ACTUAL SIZE
11.2
MM
41
42
41
38
36
17
18
40
35
FULLY SEAT BEARINGS
10
40
C
J
J
13
37
16
B
B
10.75
MM
ACTUAL SIZE
G
G
G
9. ELECTRONICS
10. SHOCK ASSEMBLY
5
6
40
50
51
52
49
47
47
48
X
S
F
X
SCREW MUST BE SNUG
CENTER SERVO FIRST
7.5
MM
ACTUAL SIZE
SHOCK OIL
SHOCK OIL
SHOCK OIL
58
55
62
62
59
66
60
56
69
64
68
65
63
U
U
61
SHOCK OIL
1. Completely fill the
shock body with
shock oil.
2. Slowly move the
shaft up and down
to remove bubbles.
3. Slowly tighten the shock cap
onto the shock body to allow
any remaining air to escape.
11. REAR SHOCK INSTALLATION
12. FRONT SHOCK INSTALLATION
53
S
M
53
S
M
13. REAR BUMPER
14. FRONT BUMPER
E
E
23
74
E
BB
BB
E
BB
BB
20
19
21
E
E
E
E
E
E
15. CAGE ASSEMBLY
82
76
77
75
92
80
81
79
78
91
AA
Z
Z
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
83
91
83
90
90
CC
Y
Y
Y
Y
Y
CC
16. CAGE INSTALLATION
V
Z
Z
V
18. SIDE BODY PANEL INSTALLATION
87
89
AA
AA
AA
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
86
88
AA
17. WHEELS
70
70
70
R
DD
R
84
85
Y
Y
Y
Y
Y
Y
Y
19. TOP BODY PANEL INSTALLATION
TUNING GUIDE
When tuning the Dromida DB4.18 make sure that you have equal lengths from one side to the other on the shocks
and upper rods. Also, make sure to have the shock pre-load adjusters at the same setting from left to right. They
do not have to be the same front to rear.
PINIONS
The Dromida DB4.18 comes stock with the 12 tooth pinion. To obtain higher top speeds you can install a larger
pinion gear onto the motor. This will, however, decrease your acceleration and run time.
TIP:
Smaller pinion equals
more torque, less top speed. Larger pinion equals more top speed, less torque.
SHOCK OIL
The Dromida DB4.18 comes stock with 30 weight oil in the shocks. The handling can be tuned by changing the
shock oil to either heavier (bigger number) or lighter (smaller number). By putting heavier oil in the shocks, the
car will have less chassis roll and become more responsive. Putting lighter oil in the shocks will cause the car to
be less responsive and have more chassis roll. For smooth, high traction surfaces, a thicker oil would be best. For
low traction or bumpy surfaces, a lighter oil would be best.
CAMBER
Camber refers to the angle at which the tire and wheel ride
in relation to the ground when viewed from the front or rear.
Negative camber is when the wheels lean inward and positive
camber is when the wheels lean outward. Usually adding
a small amount of negative camber (0° to -2°) will increase
traction. However, adding too much camber will decrease
traction. The objective is to keep as much of the tire as possible
in contact with the running surface. Never put in positive
camber. Make sure that both sides are equal.
SHOCK SPRINGS
For low traction or bumpy surfaces, a softer spring should be used. For high traction or smooth surfaces, a firmer
spring should be used.
FRONT SHOCK ADJUSTMENT
Moving the tops of the shocks out (A) will increase steering
reaction but decrease front traction. Moving the tops of the
shocks in (B) will result in slower steering reaction but will be
smoother over bumps and have more front traction.
REAR SHOCK ADJUSTMENT
Moving the tops of the shocks out (A) will increase steering
reaction and decrease rear traction. Moving the tops of the
shocks in (B) will result in slower steering reaction but will be
smoother over bumps and have more rear traction.
A
A
A
B
B
ADJUST LENGTH TO
CHANGE THE CAMBER
2˚ NEGATIVE CAMBER
We try very hard to have accurate and up-to-date information in this document. Any errors are unintentional.
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DIDC0045 v1.0 © 2014 DROMIDA, A HOBBICO COMPANY