Onan NHC Series Operator's/Service Manual And Parts Catalog page 273

DIMENSIONS AND CLEARANCES
A l l clearances qiven at r o o m temperature of 70 F.
A l l d i m e n s i o n s in inches unless otherwise specitiea.
M i n i m u m M a x i m u m
Valve S U M I I m G u i d e —Intake
Valve Stem in G u i d e — E x h a u s t
Valve Spi mg L e n g t h
Free L e n g t h .'
C o m p r e s s e d L e n g t h
Valve S p r i n g T e n s i o n (Ib.)
O p e n
C l o s e d
Valve Seat Bore Diameter
Intake
Exhaust
Valve Seat Diameter
Intake
Exhaust
Valve Stem Diameter
Intake
Exhaust
Valve G u i d e D i a m e t e r (I.D.)
Valve Lifter D i a m e t e r
Valve Lifter Bore
Valve Seat I n t e r f e r e n c e Width
Valve Face A n g l e
Valve Seat A n g l e
Valve I n t e r f e r e n c e A n g l e
C r a n k s h a f t Main B e a r i n g
C r a n k s h a f t End Play "
C a m s h a f t B e a r i n g
C a m s h a f t E n d Plav
' Juinshalt Lift
C a m s h a f t B e a r i n u D i a m e l n i
C a m s h a f t J o u r n a l Diametei
Hon B e a r i n g (Forged Rod)
i ~ouii(M;tinq Rod End Plav i l J u d i l e l i o n )
1 immci Gear Backlash
On P u m n Gear B a c k l a s h
Piston to C y l i n d e r . Strut I vpu i M e . i s m e d below o i l - c o n l r n l l m q i m q
90" f r o m pin) C l e a i a n e e
Piston Pin D i a m e t e r
Piston Pin in Piston
Piston Pin in Rod
Piston Ring G i o o v e W i d t h
1 op 1
1 op 2 :
I o p 3
Piston Rinq G a n in C v l m n c i
P i s l o n Rino Side I'.lrj.tiam.ie i t (.omnression r i m onlv)
C r a n k s h a l t M a m I j e a i i n a .Journal- S l a n n a n l Size
,'ylam I3eai inq Diamet'.-i
M a i n [3eai inii • ?ipa; ai:<:•;
C r a n k s h a f t P.-.o I-., . J : : . . : .ic lumal •-• S t a n d a r d Size
C y l i n n e i l i o n - S i a i u i a u i iiii'.'
U.0U1U
u.ou^
0.UU41J
1.662
1.375
71 / y
38 42
1.5645 1.5655
1.2510
1.2520
1.569 1.570
1.255 1.256
0 . 3 4 2 5 0 . 3 4 3 0
0 . 3 4 1 0
0 . 3 4 1 5
0 . 3 4 4
0 . 3 4 6
0 . 7 5 7 5
0 . 7 4 0 0
0 . 7 5 0 5 0 / 5 I 5
1/32
3'(34
4 4 -
4 5 °
1 •-
0 . 0 0 2 5
1
0.003H
0 . 0 0 5 0 . 0 0 9
0.001!) 0 1)0311
0 . 0 0 3
0..;OlJ
1.3700
i •. i . 1 1
1 3 / 4 i i 1 .5,4:;
U.0U0:) u OU.i >
0.UU2
i) U l u
0 0 0 2 0 UO 1
O D D ; !
i i ' i l ) : :
0.001!)
i i o . ' . :
0 7 ! ) l ) l l
. . . , 1 . 1 1 ,
l l i u
0 . 0 0 0 1
m i i 1 i h i i
' • • .1 .-I .' •
0 i.rJbi)
0 09!)IJ
i . 1 1 ! - . i . : ,
u. l tiui i
I , I ,
i. /
u l u
U i l. ' i
0 n u b
1 ':r.n>.
• II • :<
L' ' >u ! •
1 II ,
0 ••.:)'
' D I M '
' i - . - ; : .
i oi.'i.i
: . t j . .
:',(
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