$ 3%2)%3 ).4%'2!, 0/7%2 34%%2).' -!.5!, - R.H. Sheppard

1 4!",% /& #/.4%.43$ 3%2)%3 ).4%'2!, 0/7%2 34%%2).' '%!2 -!.5!, + > } ii i` * ` V 1 i` > >L i 1 UESTIONS OR 0 ROBLEMS #ALL 3 HEPPARD &IELD 3 ERVICE AT 2( 3(%0 OR REFER TO THE 3 ERVICE 3 ECTION AT WWW RHSHEPPARD COM Component Installationand Removal .. 4 Seal Replacement ..10 Relief Plungersand Axle Stops ..20 Diagnosis ..29 Maintenance ..35 Technical Terms ..39 Troubleshooting Guide ..40 Part# 1000205 rev. A2+ > } ii i` * ` V 1 i` > >L i 0/7%2 34%%2).' The Sheppard D-Series Integral Power Steering Gear is a full-time hydraulic steering unit. When compared to earlier Sheppard units and to other steering gears on the market, the D-Series gear has a number of competitive advantages.

2 Four Applications (Figure 1) For front axle ratings from 6,000 to in excess of Better Road Feel The gear feels stiffer on-center, yet takes no more effort to park than a standard gear. The time lag between steering input and response is greatly reduced. Improved Overall Performance The D-Series gear s ratio is the fastest on the market for quicker steering response and less driver effort. The HD is more responsive than the current M100 gear. Less Vibration Hydraulics are smoother to damp shudder and shake. Lighter Weight -- Stronger ductile iron reduces wall thickness and weight by about 10 pounds. Improved Maneuverability The piston and sector shaft mating redesign makes the HD about inches shorter than previous Sheppard models for closer mounting to the frame rail, so wheel cut angles can be sharper.

3 The autoplunger is recessed into the cylinder end to shorten overall length. Quieter The patent-pending 8-slot valve produces less than 70 decibels, which is below the driver s audible range from within the cab. Longer Life The HD model uses a standard M90 bearing cap, and the sector shaft seal and cover have been redesigned for longer seal life. The blind bore cylinder head reduces potential leaks and saves space. The piston rack and sector shaft has a new, more robust gear tooth design. The cylinder autoplunger is inside a removable cartridge for ease of 1. HD and MD Steering ,000 Life The sector cover seals have been redesigned for substantially longer seal life, and the remaining seals utilize the fi nest material available.

4 The blind bore cylinder head reduces potential leaks and saves space. The piston rack and sector shaft have a new, more robust gear tooth design. The cylinder head autoplunger is inside a removable cartridge for ease of 1 SJODJQMFT8 IFO UIF FOHJOF JT SVOOJOH B DPOTUBOU MPX QSFTTVSF PJM nPX UISPVHI UIF TUFFSJOH HFBS HJWFT JOTUBOU SFTQPOTF BOE BCTPSCT SPBE TIPDL UP IFMQ FMJNJOBUF TUFFSJOH XIFFM LJDL 1 SFTTVSF JT FRVBM UISPVHIPVU UIF TUFFSJOH HFBS FYDFQU JO UXP TJUVBUJPOT 8 IFO UIF FOHJOF PS TVQQMZ QVNQ JT OPU SVOOJOH BOZ UPXJOH PS NPWJOH UIF WFIJDMF TIPVME CF EPOF DBSFGVMMZ CFDBVTF UIF TUFFSJOH NBZ CF NVDI TMPXFS UP SFTQPOE UP DPSSFDUJPO *O BEEJUJPO JO UIF VOMJLFMZ FWFOU PG TVEEFO QSFTTVSF MPTT UIF TZTUFN SFWFSUT UP NFDIBOJDBM CBDL VQ TUFFSJOH TP UIBU UIF WFIJDMF NBZ CF TBGFMZ TUFFSFE UP UIF TJEF PG UIF SPBE 4 QFDJBM

5 8 BSSBOUZ 1 SPDFEVSF#FGPSF SFQMBDJOH B 4 IFQQBSE TUFFSJOH HFBS GPS "/: SFBTPO QMFBTF DPOUBDU UIF 3) 4 IFQQBSE 4 FSWJDF )PUMJOF BU 3) 4)&1 3)4 FYQFSUT XJMM QSPWJEF USPVCMFTIPPUJOH BTTJTUBODF BOE JG OFDFTTBSZ BO BVUIPSJ[BUJPO 3(" OVNCFS 5 IJT 3(" TIPVME CF OPUFE PO UIF XBSSBOUZ DMBJN "/% PO UIF TUFFSJOH HFBS CFJOH SFUVSOFE $MBJNT GPS TUFFSJOH HFBST SFQMBDFE XJUIPVU QSJPS BVUIPSJ[BUJPO GSPN 3)4 NBZ CF EFOJFE MD83HD94SD110XD120 Front Axle Range6K - 10K10K - - 18K18K - 23 KOutput Torque @ Rated Pressure 90% Efficiency35,058 inch lbs45,439 inch lbs59,760 inch lbs78,825 inch lbsRated Pressure2,683 psi2,683 psi2,756 psi2,176 psiMin. Pump Flow @ GPMPump Flow Range - - - - Travel95 959596 Max.]]

6 Operating Temperature200 F200 F200 F200 FOutput Shaft Dry Weight607085~ - GPMSD1106 - - - GPMO utput Torque @ Pressure 2,683 PSI 90% efficiencyMDHDSDHD9480,497SD11093,246103 ,626@ 2,176 psi@ 2,176 psi@ 2,176 psiXD120107,251115,668126,004 Pump Flow Range @ HWT/S Dual w/D-Series Specifi cations US Standard Units+ > } ii i` * ` V 1 i` > >L i 0/7%2 34%%2).' 4 *G B QPXFS TUFFSJOH QVNQ IBT CFFO SFQMBDFE JU TIPVME CF UFTUFE UP FOTVSF UIBU JUT QSFTTVSF BOE PJM nPX BSF UIF TBNF BT PSJHJOBMMZ TQFDJmFE CZ UIF WFIJDMF NBOVGBDUVSFS 8 IFO JOTUBMMJOH UIF TUFFSJOH HFBS PO UIF WFIJDMF UBLF DBSF UP FOTVSF UIF NPVOUJOH CSBDLFU PS TUFFSJOH HFBS JT OPU EJTUPSUFE XIFO UIF CPMUT BSF UJHIUFOFE %JTUPSUJPO DPVME DBVTF CJOEJOH JO UIF HFBS 5 SBOTGFS UIF IPTF mUUJOHT GSPN UIF PME TUFFSJOH HFBS UP UIF OFX POF 3 FQMBDF UIF 0 SJOHT "UUBDI BMM IPTFT UP UIF HFBS PS HFBST &OTVSF UIFZ BSF JO HPPE DPOEJUJPO BOE SPVUFE XJUI OP LJOLT JO UIF MJOF 3 FGFS UP UIF OFYU TFDUJPO QBHF GPS QSPQFS SPVUJOH PG EVBM TUFFS TZTUFNT 0O % 4 FSJFT HFBST UIF JOMFU BOE PVUMFU

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