|
Tune-Up Specifications - Allis-Chalmers |
This data has been gathered from old out-of-print material. While
we make every effort to be accurate, the information shown is to
be used for general reference only. It is always best to have
the original service or operator's manual for your tractor before
attempting any tuneup.
There is a legend at the bottom of the page describing some of the terms used here.
|
Model
|
Point Gap
|
Spark Plug Gap
|
Timing Mark On
|
Spark Occurs
|
Firing Order
|
Int. Valve Clearance
|
Exh. Valve Clearance
|
Comments
|
|
WC,WD,WD-45,WF |
.020 |
.030 |
FLY |
TDC |
1-2-4-3 |
.010H |
.010H |
For intake & exhaust valve clearance, WD-45 set at .012H |
|
U,UC |
.013 |
.035 |
FLY |
TDC |
1-2-4-3 |
.010H |
.010H |
|
|
H-3 |
.020 |
.025 |
FLY |
TDC |
1-2-4-3 |
.010H |
.016H |
|
|
G |
.020 |
.025 |
FP |
NOTCH |
1-3-4-2 |
.010H |
.010H |
|
|
D-19 |
.022 |
.025 |
FP |
TDC |
1-5-3-6-2-4 |
.015H |
.020H |
|
|
D-10,D-12,D-17 |
.022 |
.025 |
FLY |
TDC |
1-2-4-3 |
.013H |
.013H |
Spark plug gap for LPG is .020. Int. & Exh Valve clearance for Ser. No. D-10 (3501) D-12 (3001) & Up is .009H and .015H |
|
C,CA |
.020 |
.030 |
FLY |
TDC |
1-2-4-3 |
.010H |
.012H |
|
|
B,IB,RC |
.020 |
.035 |
FLY |
TDC |
1-2-4-3 |
.010H |
.010H |
|
|
A |
.020 |
.032 |
FLY |
TDC |
1-3-4-2 |
.012H |
.012H |
Point gap is for Fairbanks. Set Splitdorf .012-.015 |
|
D-14,D-15 |
.022 |
.025 |
FLY |
LINE |
1-2-4-3 |
.009H |
.015H |
Point gap is for D-15 only, set D-14 at .020. For spark, LPG set center. For Int. & Exh. Valve clearance, D-14 set at .013H |
| Legend |
|---|
- TDC - Top Dead Center
- FP - Crankshaft Fan Drive Pulley
- Exh - Exhaust
- Int - Intake
- ATDC - After Top Dead Center
- BTDC - Before Top Dead Center
|
|
Data collected from an old Niehoff tune-up chart.
|
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