SERVICE MANUAL DESCRIPTION Fig.  1 Eaton Heavy Duty Roll Vane Pump 1 Reservoir Cap 2 Oil Return Inlet 3 Pump Mounting Flange 4 Pump Shaft 5 High Pressure Line Fitting 6 Pump Housing 7 Reservoir The   housing   and   internal   pump   parts   are   located inside   the   reservoir   so   that   the   pump   parts   operate submerged  in  oil.    The  reservoir  is  sealed  against  the pump  housing,  leaving  the  housing  face  and  shaft  hub exposed.  A shaft seal and non-replaceable bushing are pressed into the housing from the front.  The drive shaft is inserted through this seal and bushing.  A large cavity in  the  rear  of  the  housing  contains  the  rotating  pump parts.    A  smaller  cavity  contains  the  flow  control  valve and spring. The Eaton heavy duty roll vane pump can be gear or belt driven.  Both configurations are used on International trucks. MAINTENANCE FLUID LEVEL 1. Run   engine   until   power   steering   fluid   reaches normal    operating    temperature,    approximately 800C  (1700F),  then  shut  engine  off.    Remove reservoir filler cap and check oil level on dipstick. 2. If   oil   level   is   low,   add   power   steering   fluid   to proper     level     and     replace     filler     cap.          For lubrication  intervals,  refer  to  Operator’s  Manual. For   types   of   lubricant   recommended   refer   to Lubrication Section CTS- 4033. 3. When   checking   fluid   level   after   the   steering system has been serviced, air must be bled from the system.  Proceed as follows: a. With  wheels  turned  all  the  way  to  the  left add  power  steering  fluid  to  level  indicated on dipstick. b. Start  engine,  and  running  at  idle,  recheck fluid level.  Add fluid if necessary. c. Bleed  system  by  turning  wheels  from  side to  side  without  hitting  stops.    Maintain  fluid level   so   it   is   just   visible   in   the   reservoir. Fluid  with  air  in  it  will  have  a  light  tan  or milky    appearance.        This    air    must    be eliminated from fluid before normal steering action can be obtained. d. Return  wheels  to  center  position  and  con- tinue to run engine for two or three minutes, then shut engine off. e. Road-test   vehicle   to   make   sure   steering functions normally and is free from noise. f. Recheck fluid level as described in Steps 1 and 2. BELT TENSION A    belt    that    has    been    previously    tensioned    is considered to be a used belt and should be tightened to from 245 to 311 Newtons (55 to 70 lbs.). A belt that has never been tensioned is considered to be a new belt and should be tightened to 445 Newtons (100 lbs.). Place   Belt   Tension   Gage   SE-2312,   or   equivalent, midway between the pulleys on drive belt being checked. BELT ADJUSTMENT When  adjusting  a  power  steering  pump  belt,  never pry  against  the  pump  reservoir  or  pull  against  the  filler neck.  To increase belt tension move the pump outward by   prying   against   the   bracket   pry   lugs   or   against   the pump    housing    casting    extension    directly    behind    the pump drive pulley. 1. When power steering pump is driven by a single belt: a. Loosen  the  pump  attaching  bolts  and  ad- just  the  belt  to  correct  tension  by  moving the pump outward, away from the engine. b. Snug  all  pump  mounting  bolts  and  remove pry bar. CTS-4027 - Page 3