Bobcat 741 - Page 364

ENGINE SPECIFICATIONS (Cont'd)
All dimensions are given in inches. Respective metric dimensions are given in millimeters enclosed by parentheses.
Rocker Arm And Shaft
L.H. Rocker Shaft:
0 .0. x Length ..... ..... ...................................................... 0.744 x 14.035 (18,9 x 356,5)
R.
H. RockerShaft:
0 .0. x Length . . ..... . .. .. .. . ....... . .... . ... .. ....... . ........ . ..... . ... ..... 0. 744 x 14.035 (18,9 x 350,5)
Bend ................................................................... . ............. 0.020 (0,05) or less
Rocker Arm 1.0 .................... . . . .. .. ..... ...... ....... .... .. .. .. .. .. ........ ... .. .. ..... 0.744 (18,9)
Arm to
Shaft Clearance ............. . .......................................... 0.0005-0.0017 (O ,012-D,043)
Rocker Shaft Spring:
Free Length
.. . ......... ... .. .. ............. .. .................... ................ ..... . ... . 2.098 (53,3)
Preload .... . ....... . .... . ................................................. 3.7 Ibs. @ 1.396 (1,7 kg @ 35,5)
Oil Pump
Relief Valve Opening Pressure ...... .... . ... ..... ............. .. ... .... . .... ........ ... 57-71 Ibs. (26-32 k~
Outer to Inner Rotor Clearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.0016-0.004 (O,04-D,12
Service Limit .. . ... ... .... . ....... .... ... .. .. . ..... .................... .... ... ... ....... . ... 0.010 (0,25
Pump
Body to Outer Rotor Clearance ............... . ............................. " 0.0039-0.006 (0,10-0 ,16)
Rotor Side Clearance ............................................................. 0.0023-0.005 (0,06-0,12
Service Limit ................................................................................ 0.012 (O,3~
Service Limit ............. .... .. ....... ........... .................. . ... .... ............... . . 0.008 (0,2
R~~~~ r~g~~ .. ...... ... . .. . .......... . .... . .. . ....... .. ......... ........ . .... .... .. ......... 1.850 (47,0)
Preload
................. ............. .... . .. ..... . ...... ... ... . .. . ..... .... 16 Ibs. @ 1.398 (71 N @ 35,S)
Fuel Pump
Delivery .. : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2.11 qts. (2 L) @ 5000 RPM
Closed Delivery Pressure ..... ..... . ... . .. ......... .... . ...... ..... .. ... .. . . ...... . 3. 7-5 PSI (25,5-34,5 kPa)
Carburetor
Idle RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 700-750 RPM
Type .......................... ... .. . . . .... . ................................................... Downdraft
Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 28-32DIDSA
Main Jet Diameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.037 (0,95)
Main Air Jet Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.035 (O,9~
Pilot Jet Diameter ...... .. . ............. ... .. ............................................. .. .. 0.022 (0,55
Pilot
Air Jet Diameter ........................................................................ . . 0.062 (1,6
Enrichment
Jet Diameter .............. . ........................................................ 0.023 (0,6)
Needle Valve Seat Diameter . . ... .. . .. . ............ .... . .................. .. . .. .............. ... 0.078 (2,0)
Fast Idle Opening . .. .... ... .. ........................................................................ 18 °
Idle
Compensator-Fully Open Temperature . ...... .................. ... ........ .. ...... 131-158 ° F. (55-70 ° C.)
Water Pump
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal, Impeller Type
Belt Tension .......................................................... 0.276-0.394 @ 221bs. (7- 10 @ 10 kg)
Thermostat
Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Wax Type
Valve Cracking Temperature .. .............. ..... ........ . .... .... . .. . .. .. ....... .... ...... . 180° F. (82° C.)
Valve Lift & Temperature ... ... .... . ..... . . ...... . ...... .... . .. .. . : ............ .. 0.31 (8,0) @ 203° F. (95° C.)
Revised Sept. 90
-80--6-
741,742,743 & 743DS Bobcat Loader
Service Manual