Onan RDJC User Manual

Dimensions and Clearances
All clearances given at room temperature of 70' F (21'C) .
Ail dimensions in inches (mililmetres in parentheses) unless otherwise specified .
CAMSHAFT .
Bearing Journal Diameter. Front ......................................... 2.2500-2.2505 (57.150-57.163)
Bearing Journal Diameter. Center ........................................ .. I .2580. 1.2582 (31.953-31.958)
Bearing Journal Diameter. Rear ...................... .' .................... 1 . 1875-1 . I880 (30.1 63-30.1 75)
Bearing Clearance Limit (0 rig i nal) .............................................. .0015-. 0030 (.038-.076)
Bearing Clearance Limit (Replacement) .......................................... .0012-. 0049 (.030-.123)
End Play ............................................................................ .007-. 039 (0.2-1.0)
Cam Tappet.Diameter (RDJC Prior to Spec P) ................................ .7475-. 7480 (18.987-18.999)
Cam Tappet Hole Diameter (RDJC Prior to Spec P) ........................... .7507.. 7515 (19.068-19.088)
Cam Tappet Hole Diameter (RDJF. RDJC Begin Spec P) ...................... .8755-. 8765 (22.238-22.263)
Large Bore Diameter .................................................. 2.1871-2.1876 (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 ....... .............................................. 3.2495-3.2505 (82.537-82.563)
Maximum Allowable Taper ................................................. : .............. 1 0.005 (0.127)
Maximum Allowable Out-of-Round .......................................................... 0.001 (0.025)
Main Bearing Journal Diameter .......................................... 2.2427-2.2435 (56.965-56.985)
Front and Rear Main Bearing Clearance (Original) ................................ .0030-. 0043 (.076-.109)
Center Main Bearing Clearance (Original) ....................................... .0024-. 0052 (.061-.132)
Front and Rear Main Bearing Clearance (Replacement) ............................. .0024-. 0062 (.06-.16)
Center Main Bearing Clearance (Replacement) ................................... .0024-. 0052 (.061 -;I 32)
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)
Clearance in Cylinder
Measure
90" to pin. just below oil ring ............................................ .0055-. 0075 (.140-.191)
Ring Groove Width
Cam Tappet Diameter (RDJF. RDJC Begin Spec P)
........................... .8725.. 8730 (22.162-22.174)
CONNECTING RODS
CY LlNDER
CRANKSHAFT
PISTONS AND RINGS
TOP ...................................... i ................................
NO . 2 ......................................................................
NO . 3 ......................................................................
NO . 4 ......................................................................
.0970.. 0980 (2.464-2.489)
.0965-. 0975 (2.451 -2.477)
.0965.. 0975 (2.451-2.477)
.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-.Ol8)
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)
c
4
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Onan RDJC Specifications

General

Brand	Onan
Model	RDJC
Category	Engine
Language	English