TM 5-3805-260-24
(1)
Diameter of the surfaces (journals)
for the camshaft bearings
(new)...................... ............2 500 0005 in (63 500 0 013 mm)
Bore In the live bearings for the
camshaft (new) ......2.5035 0015 in (63 589 0 038 mm)
Maximum permissible clearance between bearing and
bearing surface journal) (, worn).007 in (0 18 mm)
(2)
Tight fit between the gear
and camshaft .........0012 to 0028 in (0 030 to 0 071 mm)
Maximum permissible temperature
of the gear for Installation on
the camshaft (do not use a torch)
600 F (315 C)
(3)
End play for the camshaft..007 003 in ( 18 08 mm)
Maximum permissible end play (worn) 020 In (0 51 mm)
(4)
Width of thrust groove in
camshaft (new) ......360 002 in (9 14 0 05 mm)
Diameter of thrust
pin (new) I.............. ............353 001 in (8.97 0 03 mm)
Torque for thrust pin- ..........35 5 lb ft (45 7 N m)
NOTE For installation of camshaft. The timing mark or the camshaft
gear tooth must be in alignment with the timing mark on the tooth
space of the crankshaft gear
(5)
Height of camshaft lobes
To find lobe lift, use the following procedure
A.
Measure camshaft lobe height (5)
B.
Measure base circle (7)
C.
Subtract base circle (STEP 8) from lobe height (STEP A) The
difference Is actual lobe lift (6)
D.
Specified camshaft lobe lift (6) is
a. Exhaust lobe..... ............3071 in (7 800 mm)
b. Intake lobe ........ ............3077 in (7.816 mm)
Maximum permissible difference between actual lobe lift (STEP C)
and specified lobe lift (STEP D) is 010 in (0 25 mm)
1-11
