Bobcat 741 - Page 363

ENGINE SPECIFICATIONS (Cont'd)
All dimensions are given in inches. Respective metric dimensions are given in millimeters enclosed by parentheses.
Valve Train (Cont'd)
Overall Length:
Intake ...... . .... .. . . ...... . ... ... . ... ........ . ... ........ . .. ... ..... .. .. ........ .. ....... 4.071 (103,4)
Exhaust .. ..... . . ... ...... . . . . ... . ....... ... . ..... .... .... .. . . .. . .. .... . .. ..... .. ..... . . ..... 3.937 (100)
Thickness of Head:
Intake ....... ...... .... ..... .. .. . . .. . ..... ........... ... ....... ... . . . ... . ........ .... . ..... . 0.059 (1,5)
Service Limit
.... . ....... . ............. ..... ... . ... ........... ... .. .. . . . .... .... . ... ..... .. -0.020 (0,5~
Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.059 (1,5
Service Limit
.... . ......... .... .. ... ...... .. ..... . .. . .... ........ .. .. ................ .. ... -0.020 (-0,5
Clearance to Guide:
Intake ... .. ... . .......... ... . .... ... .. .. ............ . ..... .. .. .............. 0.0010-0.0023 (0,025-0, 0581
Service Limit .......... ..... .. ... ... . . .. .. ... ................. . ....... . ....... .. ............ 0.004 (0,1
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.0020-0.0034 (0,05-0,085
Service Limit ........ ......... . ......... ...... . .... ............ . . .......................... 0.006 (0,15
Valve Clearance:
Cold
Intake
...... .................................. . .............. ... .. ........................ 0.003 (0,08)
Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.007 (0,18)
Hot:
Intake . . .. .............................................. .... .... .. ... ... ...... .. .......... 0.006 (0 ,1 5)
Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.010 (0,25)
Valve
Guide
Valve Guide 0.0 ............................. ... . .. ....... .. .. . ... .. .. .. ........... ........... 0.512 (13,0)
Valve
Guide 1.0.:
Service Limit ...... . .. ..... .... .. . .... . .. ... .................... . ........................ -0.004 (-0,10
Intake
.................................... .. ............ .. ..... ...... . . ..... ..... 0.315-0.317 (8,(}-8,051
Exhaust. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.315-0.317 (8,(}-8, 05
Valve Guide Installed Length .. . ..... . ... . . ... .. .................... .. ..... .... ... . .. 0.539-0.563 (13,7-14,3
Service Limit
.... . .. ..... ... ... . . . .. ....... . ............. . ................. .. ............ -0.006 (-0, 15~
Valve Guide O.S .. .. . ................ . ................... ..... ......... 0.010 (0,05); 0.020 (0,25); 0.030 (0,50
Valve Seat
Ring O.S .:
Intake
8:g1~ m:~~ 81 :::::::::::::::::::::::::: ::: :::::::::::::::::::::::::::::::::::::::::::::: ~ :~~~ g~:~~
Exhaust
g:g1~ m:~~ 81 ::::::::::::::::::::::::::::::: : :::::::::::::::::::::::::::::::::::::::::: : ~ :~~g ~~:~~
Height of Ring:
0.012 (0,3) O.S .. ......................... . ... .. . .... ......... . ....... . ........... 0.291-0.299 (7,4-7,6)
0.024 (0,6) O.S. . ...... ... ....... .... . ....... ............ ...... ............... ... .. 0.303--0.311 (7,7-7,9)
Valve Spring
Color Code BLUE:
New
~ree ~e~gth . ........... ............... .... ... . . . ... . . ...... .... ........ . .............. . 1.811 (46,0)
Service Limit
... . ............ . . .. ......... ........ ......................... . ...... ... ... . . -0.039 (-1 , 0)
New Pre-load ............... .. . ... .. . ................ .. .......... ... ...... 82 Ibs. @ 1.469 (365 N @ 37,3)
Use
Pre-load .... . . ....... . .... ................... .. ....................... 831bs. @ 1.106 (414 N @ 28,1)
Inclination .. .... ..... . .. ... .. . ................ ... . ....... ............... . ...... .......... ..... . ..... 1.5
0
Service Limit . .. . . .............. ........... .......... ...... .... ...... .. .... .......................... 3
0
Revised Sept. 90
-80-5-
741, 742, 743 & 743DS Bobcat Loader
Service
Manual