TM 9-2320-302-34
0026 00-10
CAMSHAFT AND BEARINGS REPLACEMENT - CONTINUED
0026 00
INSPECTION - CONTINUED
2.
If there is doubt of camshaft acceptability, determine extent of camshaft lobe wear as follows:
a.
Using set of 0.0015-0.010 in (0.038-0.254 mm) thickness gages (17) and piece of square, hard material (18), mea-
sure flats on injector rise side (19) of camshaft lobes (4).
b.
If flats measure less than 0.0003 in (0.076 mm) in depth, but there are no other camshaft defects, camshaft is satis-
factory.
NOTE
If one camshaft bearing needs replacement, replace all camshaft bearing shells.
c.
Inspect camshaft bearings for signs of excessive wear, scoring or pitting.
d.
Determine camshaft bearing clearance:
NOTE
Ensure locating tangs are correctly positioned.
(1)
With lower camshaft bearing shells (29) installed in cylinder head, install camshaft (5) on seven lower
camshaft bearing shells.
(2)
Install seven upper camshaft bearing shells (24) in seven camshaft bearing caps (23).
(3)
Wipe any oil from camshaft bearing shells and camshaft journals.
(4)
Place a piece of plastiguage (30) full width of each upper camshaft bearing shell (24) about ¼ in (6-7 mm)
off center.
(5)
Install camshaft bearing caps (23) and camshaft bearing shells (24) on correct camshaft journals and install
seven camshaft cap bolts (20). Tighten bolts to 75-86 lb-ft (102-117 Nm).
(6)
Install two rocker shaft studs (21) in camshaft bearing caps (23) no. 1 and no. 7. Tighten studs to 75-86 lb-
ft (102-117 Nm).
(7)
Install two rocker shafts (31) on seven camshaft bearing caps (23).
(8)
Install eight rocker shaft saddle washers (32), six bolts (33), and two nuts (34). Tighten bolts and nuts to
75-86 lb-ft (102-117 Nm).
19
17
18
4
REAR VIEW
