Onan MDJE Service Manual

Dimensions and Clearances
All clearances given at room temperature of 70°F (21 "C) .
All dimensions in inches (millimeters in parentheses) unless otherwise specified .
CAMSHAFT
Bearing Journal Diameter. Front ............................................. 2.2500-2.2505 (57.1 50-57.1 63)
Bearing Journal Diameter. Center (4 cylinder) ................................. 1.2580-1.2582 (31 -953-31.958)
Bearing Journal Diameter. Rear ............................................. 1.1 875-1.1880 (30.163-30.175)
Bearing Clearance Limit (Original) .................................................. .0015-. 0030 (-038-.076)
Bearing Clearance Limit (Replacement) ............................................. .0012.. 0049 (.030-.123)
End Play .............................................................................. .007.. 039 (0.2-1.0)
Cam Tappet Diameter (Prior to Spec P) ......................................... .747 5.7480 (18.987-18.999)
Cam Tappet Hole Diameter (Prior to Spec P) ................................... .7507.. 7515 (19.068-19.088)
Cam Tappet Diameter (Begin Spec P) .......................................... .8725.. 8730 (22.162-22.174)
Cam Tappet Hole Diameter (Eegin Spec P) ..................... : ............... .8755.. 8765 (22.238-22.263)
Large Bore Diameter ..................................................... 2.1 871 -2.1 876 (55.5523-55.5650)
Small Bore Diameter ........................................................ 1.043-1.045 (26.4922-26.543)
Large Bearing Bore to Small Bearing Bore
(Center-to-Center)
..................................................... 5.998-6.002 (1 52.3492-1 52.4508)
Connecting Rod End Play ............................................................. .002.. 016 (.05-.41)
Bore Honed Diameter (MDJA. MDJB. MDJC) ................................. 3.2495-3.2505 (82.537-82.563)
Bore Honed Diameter (MDJE. MDJF) ........................................ 3.4995-3.5005 (88.887-88.91 3)
Maximum Allowable Taper ................................................................. 0.005 (0.127)
Maximum Allowable Out-of-Round .......................................................... 0.001 (0.025)
Main Bearing Journal Diameter (1 & 2 cylinder) ................................. 2.2437-2.2445 (56.99-57.01)
Main Bearing Journal Diameter (4 cylinder) ................................... 2.2427-2.2435 (56.965-56.985)
Center Main Bearing Clearance (4 cylinder) ......................................... .0024.. 0052 (.061-.132)
Front and Rear Main Bearing Clearance (Original) (4 cylinder) ......................... .0030.. 0043 (.076-.109)
Main Bearing Clearance (Original) (1 & 2 cylinder) .................................... .002.. 0033 (.051-.084)
Connecting Rod Journal Diameter ........................................... 2.0597-2.0605 (52.31 6-52.337)
Rod Bearing Clearance ............................................................ .001.. 0033 (.025-.084)
End Play ........................................................................... .010.. 015 (.254-.381)
CONNECTING RODS
CY Ll NDER
CRANKSHAFT
Front and Rear Main Bearing Clearance (Replacement) (4 cylinder) ...................... .0024-. 0062 (.06-.16)
Main Bearing Clearance (Replacement) (1 & 2 cylinder) ................................. .0014-. 0052 (.04-.13)
PISTONS AND RINGS
Clearance in Cylinder
Measure
90' to pin. just below oil ring
Ring Groove Width
(Prior to Spec
P). ............................................................... .0050.. 0070 (.127-.178)
(Begin Spec P) ................................................................. .0055-. 0075 (.140-.191)
TOP ......................................................................... .0970.. 0980 (2.464-2.489)
NO . 2 ........................................................................ .0965.. 0975 (2.451 -2.477)
NO . 3 ........................................................................ .0965-. 0975 (2.451-2.477)
NO . 4 ........................................................................ .1880.. 1897 (4.775-4.818)
Ring Gap ............................................................................ .010.. 020 (.25-51)
Clearance in Piston ..................................................................... Thumb-push Fit
Connecting Rod Bushing Clearance
................................................ .0002.. 0007 (.005-.018)
Rotation ............................................................................. Counterclockwise
Pinion Clearance
to Pinion Stop (Solenoid Plunger Bottomed) ........................... .070.. 120 (1.78-3.05)
Armature End Play .................................................................. .005.. 030 (.030-.760)
PISTON PIN
STARTING MOTOR (prestolite)
4
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Onan MDJE Specifications

General

Brand	Onan
Model	MDJE
Category	Engine
Language	English