7N1904 Spring (outer) for valve

Custom Search

Back
CAMSHAFTS (3512 and 3516)

Up
TM-5-2815-232-14 Engine Diesel Caterpillar Model 3508 Manual

Next
VALVE COVERS

3500 ENGINE

SPECIFICATIONS

(1)

Height to top of valve guides

(4)

Diameter of valve stems

...................... 26.00 + 2.00 mm (1.024 + .079 in.)

(new) .........9.441 + 0.008 mm (.3717 + .0003 in.)

(2) 7N1904 Spring (outer) for valve:

Length under test force ...... 56.36 mm (2.219 in.)

Test force ................... 254 + 25 N (56.9 + 5.6 lb.)

Use again minimum load at length under test

force ............................................ 229 N (51.5 lb.)

Length of spring at valve open position

............................................ 40.36 mm (1.589 in.)

Use again minimum load at valve open position

...................................................... 800 N (180 lb.)

Bore in valve guides with guides installed in the head

Free length after test .......... 62.50 mm (2.461 in.)

(new) .........9.487 + 0.025 mm (.3735 + .0010 in.)

Outside diameter ................ 43.96 mm (1.731 in.)

Use again maximum bore in valve guides with

guides installed in the head

Spring must not be bent more than

............................................9.540 mm (.3755 in.)

................................................ 2.18 mm (.086 in.)

(5)

Diameter of valve

(3)

7N1903 Spring (inner) for valve:

heads ............56.00 + 0.15 mm (2.205 + .006 in.)

Length under test force ...... 45.49 mm (1.791 in.)

Angle of valve faces ..........................291/4 + 1/4

(6)

Test force ..................... 125 12 N (28 + 2.7 lb.)

(7)

Depth of bore in head for valve

Use again minimum load at length

seat inserts........ 14.00 + 0.15 .lm (.551 +.006 in.)

under test force ........................... 113 N (25.4 lb.)

(8)

Diameter of valve seat

Length of spring at valve

inserts....60.119 + 0.015 mm (2.3669 + .0006 in.)

open position ...................... 29.49 mm (1.161 in.)

Bore in head for valve seat

Use again minimum load at valve

inserts....60.000 + 0.025 mm (2.3622 + .0010 in.)

open position ............................... 397 N (89.3 lb.)

(9)

Angle of face of valve seat

inserts.................................................3014 + 1/2

Free length after test .......... 51.54 mm (2.029 in.)

Outside diameter ................ 29.24 mm (1.151 in.)

(10)

Outside diameter of the face of valve seat

inserts............55.14 + 1.48 mm (2.171 + .058 in.)

Spring must not be bent

more than ............................... 1.83 mm (.072 in.)