Onan DJA Series User Manual

DIMENSIONS AND CLEARANCES
All values in inches unless otherwise specified.
CAMSHAFT
Bearing Journal Diameter, Front
Bearing Joumal Diameter, Rear
Bearing Clearance Limit
End Play, Camshaft
Cam Tappet Hole Diameter
Cam Tappet Diameter
CONNECTING RODS
Large Bearing Bore Diameter
Small Bushing Bore Diameter
Distance Ctr. Large Bearing Bore to Small
Bushing Bore
Clearance, Large Bearing to Crankshaft
CYLINDER
Cylinder Bore
Cylinder Diameter Limits
CRANKSHAFT
Main Bearing Journal Diameter
Crankshaft Main Bearing Clearance
Connecting Rod Joumal Diameter
End Play, Crankshaft
PISTON
Piston Clearance to Cylinder Wall
Piston Pin Hole Diameter
Ring Groove Width. Top
Ring Groove Width, 2nd
Ring Groove Width, 3rd
Ring Groove Width, 4th
PISTON PIN
Length
Diameter
Piston Clearance
Connecting Rod Bushing Clearance
PISTON RINGS
Ring Type
Top
2nd
3rd
4th
Ring Width
Top
2nd
3rd
2.500 - 2.505
1.1875 - 1.1880
.0012- .0037
.007 - .039
.7505 - .7515
.7475- .7480
2.1871- 2.1876
1.044 - 1.045
5.998 - 6.002
.001- .003
3-1/4
3.2495 - 3; 2505
2.2440 - 2.2445
.0014 - .0052
2.0600 - 2.0605
.010- .015.
.0055 - .0075
.9900 - .9903
.097 - .098
.0965 - .0975
.0965 - .0975
.1880- .1895
2.753 - 2.738
.9899 - .9901
Thumb Push Fit
.0002 - .0007
Compression
Compression
Compression
Oil Control
.0925- .0935
.0925 - .0935
.0925 - .0935
STARTING MOTOR
Rotation
Pinion Clearance to Pinion Stop (Solenoid
Plunger Bottomed)
Pinion Rest Position - Distance from
Pinion Housing Mounting Face to Outer
Edge of Pinion
Armature End Play
Test Specifications
No Load
Stall Torque
Brush Spring Tension
Counterclockwise
.070- .120
1-9/32- 1-15/32
.005 - .030
10-V - 80-Amps
5000-rpm Min.
4-V - 420-Amps
7.8 ft. lbs. Min.
32 - 40 oz. with
new brushes
VALVE INTAKE (Hardened Chrome Alloy Faced)
Stem Diameter . .3405-.3415
Clearance in Guide .0005 - .0025
Seat Angle 42°
Valve Clearance See Fig. 11-2
VALVE, EXHAUST (Hardened Chrome Alloy)
Stem Diameter .3405 -.3415
Clearance in Guide .0025 - .0045
S eat Angle 45°
Valve Clearance See Fig. 11-2
VALVE GUIDE
Length 1-25/32
Outside Diameter .4690 - .4695
Cylinder Block Bore Diameter .467 - .468
Inside Diameter (after Reamingl
Exhaust .344 - .345
Intake .342 - .343
VALVE SEATS (Hardened Chrome Alloy Faced)
Valve Seat Bore
Diameter
Depth (from Cylinder Head Face)
Seat Outside Diameter
Seat Width
Seat Angle
Available Oversizes
1.361- 1.362
.433 - .439
1.364 - 1.365
3/64 - 1/16
45°
.002,.005,.010
.025
VALVE SPRINGS
Free Length
Length, Valve Closed
Load, Valve Closed
Length Valve Open
Load, Valve Open
1-7/8
1.528
45 - 49 lbs.
1.214
83 - 93 lbs.
42

Onan DJA Series Specifications

General

Brand	Onan
Model	DJA Series
Category	Engine
Language	English