Farmall 90 - Page 5

SECTION 10 -- ENGINE -- CHAPTER 1
5
GENERAL SPECIFICATIONS (continued) 4 Cylinders
Cooling system ....................................... coolant circulation
Radiator on Models Farmall 90, Farmall 95 ................ 4 lines of vertical pipes with copper fins
Fan,attachedtothepulley ............................... intake, in plastic with 11 blades
Coolantpump .......................................... centrifugal vane--type
Engine speed/coolant pump speed ratio ...................
Coolantthermometer ...................................
Temperature ranges corresponding to each section:
--Initialbluesection .....................................
-- Middle green section (normal working conditions) .........
--Finalredsection ......................................
1:1.977
colored scale divided into 3 sections
40° to 60 °C (104 to 140 °F)
60° to 110 °C (140 to 230 °F)
110° to 120 °C (230 to 248 °F)
Temperaturecontrol .................................... via thermostat valve
-- initial opening ....................................... 81 ± 2 °C (177.0 ± 35.6 °F)
Timing system ........................................ overhead valves operated by tappets, rods
and rocker arms via the camshaft located
in the engine block; the camshaft is driven
by the crankshaft using straight--tooth
gears
Intake:
-- start:beforeT.D.C. .................................. 10°±30’
-- end: after B.D.C. .................................... 10°±30’
Exhaust:
-- start:beforeB.D.C. .................................. 64°
-- end: after B.D.C. .................................... 26°
Valve--rocker arm clearance (with engine cold):
-- intake ............................................. 0.25 ± 0.05 mm (0.0098 ± 0.002 in)
-- exhaust ............................................ 0.50 ± 0.05 mm (0.0197 ± 0.002 in)
For further timing system technical data ................... see page 9
Fuel system
Air cleaning ............................................ dual cartridge dry air filter, with clogged
filter indicator with centrifugal pre--filter and
automatic dust ejector
Fuelpump............................................. with double diaphragm
Fuelfiltering ........................................... through wire filter in fuel supply pump, and
replaceable cartridge on delivery line to
injection pump
Minimum fuel flow rate with pump shaft rotating at 1800 rpm . . 127.6 l/h (33.7 gal/hr)
Cam operated .......................................... engine timing
BOSCHinjectionpump .................................. rotating distributor type