Piston Rings; Piston Pin; Belt Pulley - Allis-Chalmers U Service And Maintenance Manual

OIL PtUP
Type - Gear
Drive - Gear Driven
Oiling system - Pressure
Pump location - Oil sump
Gears in pump body end, clearance
.006" to
Backlash of 011 pump gears
.001" to .004"
PISTONS - Gasoline Motor
Piston Dia.
First land 4.728" to 4.732"
Second land and third land
4.734" to 4.738·
Fourth land 4.738" to 4.742"
Skirt 4.743" to 4.744"
Piston clearance in liner
First land .017" to .023"
Second and third land
to .017"
Fourth land .007· to .013"
Skirt .005" to .008"
Ring land wIdth
FIrst land .250" ~ .001"
Second land .250" ~ .001"
Third land .250" + .001"
Fourth lartd .250"
+
.001"
PISTON RINGS
End Gap - .014" to.021"
RIng wIdth
All .249"
Land clearance - .001" to .002"
PISTONS - Low Grade FUel
PIston Dla.
FIrst land 4.978" to 4.982"
Second and third land
4.984" to 4.988·
Fourth land 4.988" to 4.992"
SkIrt 4.993" to 4.994"
PIston clearance in lIner
FIrst land .017" to .023·
Second land .011" to .017"
ThIrd land .011" to .017"
Fourth land .007" to .013"
Skirt .005" to .008"
RIng land width
FIrst land .188" to .189"
Second land .187" to .188"
Third land .18~ to .188"
Fourth land .250" to .251"
PISTON RHUS
End Gap - .015" to .023"
RIng wIdth
CompressIon - .187"
011 RIng - .248"
Land clearance - .001" to .002·
PISTON PIN
Clamp In pIston
BushIng In connectIng rod
Pin dla. - 1.501"
Bu shmg dla. 1.502·
+
.0005· -.0005·
P1n clearence In bushing .0005· to .0015"
VALVES
Exhaust dia. - 2-7/32"
Intake dia. - 2-7/32"
Stem dia. - .434"
+
.0005"
Face width - 1/8"
Seats exhaust - removable
Seat wIdth - 1/8"
Seat angle - 45
0
Guides removable
Guide insIde dIa. - .437" to .438"
Stem clearance in guIde
.0025" to .0045"
V.ALVE SPRINGS
Free 1 ength 3-1/16"
Spring compressed to 2-5/16" or
closed 50 Ibs.
Spring compressed to 1-27/32" or
open 85 Ibs.
Tappet type - cylindrIcal
Tappet clearance .012" (hot motor)
Intake valve opens 5 degrees after
top center, closes 40 degrees
after lower center.
Exhaust valve opens 44 degrees
before lower center, closes
9 degrees after top center.
CHASSIS
BELT PULLEY (Before ;3erIal #26526)
Type - Clutch
BearIngs - Pinion shaft - ball
Idler Gear - Hyatt roller
Pulley shaft - Taper roller
Dla. - 13"
Face wIdth - 8-1/2"
R.P.M. - 948
Belt feet per min. 3200
BELT PULLEY (SerIal 126526 and Since)
R.P.M. - 925
Belt feet per mIn. - 3150
BRAKE
Type - ContractIng hand operated
LInIng - Woven
LInIng sIze - 3/16" x 2" x 22-3/16"
LocatIon - Left hand end cross shaft
Adjustment - Nut
CLUTCH
Type - SIngle plate sprIng loaded
dry dISC
DIa. - 14"
faCIng thIckness and quantIty -
sIx 1/8· and six 5/32"
Number of pressure sprIngs - 12
Adjustment - 1/4" clearance between
release levers and throwout bearIng
DI
Type - Four pInIon
BearIng - Taper roller
BearIngs and rIng gear adjustment-
threaded adjustIng rIng.