Section 14: STEERING
PA1564
4
2. POWER STEERING GEAR
FIGURE 2: POWER STEERING GEAR
14035
2.1 DESCRIPTION
The power steering gear is located in the lower
part of front service compartment (Figs. 2 & 3).
The housing of the ZF-Servocom contains a
control valve, working cylinder and a complete
mechanical steering gear. The pressure oil for the
steering is delivered by a motor-driven oil pump
which is supplied with oil from an oil tank.
The housing is designed as a cylinder for the
piston, which converts the rotation of the steering
shaft and the worm into an axial movement and
transfers this to the steering worm sector shaft.
The serration of the sector shaft is straight-cut
with a high surface quality in such a way that it is
only possible to set a unique setting without play
on installation in the straight-ahead driving area
by means of the two eccentrically designed lateral
housing covers.
The piston and worm are connected via a ball
chain. When the worm is turned, the balls are
collected by a circulating pipe at one end of the
chain and fed in again at the other end, thus
producing an endless ball chain.
The control valve consists of the valve slide in a
needle bearing in the worm, with six control
grooves on the circumference and the control
sleeve on the worm, which also has six control
grooves. The valve slide, designed with steering
shaft connection, turns together with the worm as
the steering wheel is turned.
FIGURE 3: FRONT SERVICE COMPARTMENT
14039
A torsion bar, which is pinned with the valve slide
and the worm, keeps the control valve in the
neutral position as long as no opposing force is
applied to the steering wheel. The steering
housing contains a pressure relief valve, which
limits the discharge pressure of the oil pump to the
maximum value required. A replenishing valve can
also be used, through which oil is sucked from the
return if steering is not hydraulically boosted.
Compared with constant ratio, steering versions
with variable ratio are more directly designed in
the center area than outside the center area. The
resulting smaller steering corrections benefit
steering behavior in straight-ahead driving. At the
same time, the indirect transmission means that
there is a higher hydraulic torque available at the
steering arm in parking movement. If the
hydraulic assistance fails, the operating forces on
the steering wheel are correspondingly lower in
this area. This is achieved through a
piston/steering worm sector shaft serration with
differing modulus and angle of pressure.
Upon transfer of a torque from the steering shaft
to the worm, or vice versa, the torsion bar is
deformed in the elastic area so that there is
torsion between the valve slide and the control
sleeve. When the steering wheel is released, the
torsion bar ensures that the valve is returned to
the neutral position.
Refer to the
"ZF-SERVOCOM Repair Manual"
and
“
ZF-SERVOCOM Operating, Servicing
/Maintenance and Inspection Instructions”
annexed to this section for the functional aspects
and maintenance procedure of the steering gear.
NOTE
Also available is the ZF-Servocomtronic, which
provides variable assistance in function of
speed.
Содержание LE MIRAGE XLII BUS SHELLS
Страница 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1564 1ST EDITION...
Страница 12: ...Section 00 GENERAL INFORMATION 10 PA1564 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005...
Страница 13: ...Section 00 GENERAL INFORMATION PA1564 11 FIGURE 14 CONVERSION CHART 00006...
Страница 14: ......
Страница 30: ......
Страница 63: ...SECTION 01 ENGINE PA1564 33 FIGURE 13 POWER PLANT CRADLE INSTALLATION 01140...
Страница 108: ......
Страница 160: ......
Страница 210: ......
Страница 229: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12...
Страница 254: ......
Страница 281: ......
Страница 282: ......
Страница 283: ......
Страница 284: ......
Страница 285: ......
Страница 286: ......
Страница 287: ......
Страница 288: ......
Страница 289: ......
Страница 290: ......
Страница 291: ......
Страница 292: ......
Страница 303: ...SPICER SPECIALITY AXLE DIVISION place product photo here SERVICE MANUAL GENERAL INFORMATION NDS Axle range BACK RETOUR...
Страница 309: ......
Страница 348: ...Page No 18 Manual No NDS8 Spicer Speciality Axle Division Technical Publications Spicer Speciality Axle Division TP1193...
Страница 379: ...Section 12 BRAKE AND AIR SYSTEM PA1564 21 FIGURE 38 AIR OPERATED BRAKING SYSTEM WE...
Страница 380: ...Section 12 BRAKE AND AIR SYSTEM PA1564 22 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5...
Страница 387: ...Section 12 BRAKE AND AIR SYSTEM PA1564 29 FIGURE 46 ABS 6S 5M CONFIGURATION...
Страница 418: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA...
Страница 422: ......
Страница 430: ......
Страница 438: ......
Страница 445: ......
Страница 458: ......
Страница 514: ...48 REVISED 5 31 05 BW2429 2005 Bendix Commercial Vehicle Systems LLC All Rights Reserved 5 05 Printed in U S A...
Страница 534: ......
Страница 540: ......
Страница 543: ......
Страница 596: ...52 9 Inch Fraction Decimal and Millimeter Equivalents Chart Up to 1 inch 9 1 9 Conversion Tables...
Страница 660: ......
Страница 661: ......
Страница 662: ......
Страница 663: ......
Страница 664: ......
Страница 665: ......
Страница 666: ......
Страница 667: ......
Страница 668: ......
Страница 669: ......
Страница 670: ......
Страница 671: ......
Страница 672: ......
Страница 673: ......
Страница 674: ......
Страница 675: ......
Страница 676: ......
Страница 677: ......
Страница 678: ......
Страница 679: ......
Страница 680: ......
Страница 681: ......
Страница 682: ......
Страница 683: ......
Страница 684: ......
Страница 685: ......
Страница 686: ......
Страница 687: ......
Страница 688: ......
Страница 689: ......
Страница 690: ......
Страница 691: ......
Страница 692: ......
Страница 693: ......
Страница 694: ......
Страница 695: ......
Страница 696: ......
Страница 697: ......
Страница 698: ......
Страница 699: ......
Страница 700: ......
Страница 701: ......
Страница 702: ......
Страница 703: ......
Страница 704: ......
Страница 705: ......
Страница 706: ......
Страница 707: ......
Страница 708: ......
Страница 709: ......
Страница 710: ......
Страница 711: ......
Страница 712: ......
Страница 713: ......
Страница 714: ......
Страница 715: ......
Страница 716: ......
Страница 717: ......
Страница 718: ......
Страница 719: ......
Страница 720: ......
Страница 721: ......
Страница 722: ......
Страница 723: ......
Страница 724: ......
Страница 725: ......
Страница 726: ......
Страница 727: ......
Страница 728: ......
Страница 729: ......
Страница 730: ......
Страница 731: ......
Страница 732: ......
Страница 733: ......
Страница 734: ......
Страница 735: ......
Страница 736: ......
Страница 737: ......
Страница 738: ......
Страница 739: ......
Страница 740: ......
Страница 741: ......
Страница 742: ......
Страница 743: ......
Страница 744: ......
Страница 745: ......
Страница 746: ......
Страница 747: ......
Страница 748: ......
Страница 749: ......
Страница 750: ......
Страница 751: ......
Страница 752: ......
Страница 753: ......
Страница 754: ......
Страница 755: ......
Страница 756: ......
Страница 757: ......
Страница 758: ......
Страница 759: ......
Страница 760: ......
Страница 782: ...Section 16 SUSPENSION PA1564 22 FIGURE 26 SWAY BAR FRONT SUSPENSION 16138D FIGURE 27 SWAY BAR REAR SUSPENSION 16014...
Страница 798: ......
Страница 886: ......
Страница 900: ......
Страница 902: ......
Страница 904: ......
Страница 910: ......
Страница 916: ......
Страница 920: ......
Страница 924: ......
Страница 926: ...PROCEDURE NO SAV00044 REVISION 00 Page 2 of 2 Slide out...
Страница 930: ......
Страница 932: ......
Страница 934: ......
Страница 940: ......
Страница 944: ......
Страница 946: ......
Страница 954: ......
Страница 976: ......
Страница 988: ......
Страница 992: ......
Страница 996: ......
Страница 1032: ......
Страница 1038: ......
Страница 1044: ......
Страница 1064: ......
Страница 1083: ...Section 22 HEATING AND AIR CONDITIONING PA1564 15 FIGURE 16 REFRIGERANT CIRCUIT CENTRAL SYSTEM 22247...
Страница 1086: ...Section 22 HEATING AND AIR CONDITIONING PA1564 18 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP...
Страница 1106: ...Section 22 HEATING AND AIR CONDITIONING PA1564 38 FIGURE 39 REFRIGERANT CIRCUIT SMALL SYSTEM 22350...
Страница 1108: ...Section 22 HEATING AND AIR CONDITIONING PA1564 40 FIGURE 42 CENTRAL HEATING SYSTEM COMPONENTS 22338...
Страница 1118: ...Section 22 HEATING AND AIR CONDITIONING PA1564 50 FIGURE 54 HEATER LINE SHUTOFF VALVES WE...
Страница 1119: ...Section 22 HEATING AND AIR CONDITIONING PA1564 51 FIGURE 55 SMALL HEATING SYSTEM COMPONENTS 22337...
Страница 1124: ......
Страница 1125: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R...
Страница 1126: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
Страница 1149: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R...
Страница 1177: ......
Страница 1178: ......
Страница 1179: ...1...
Страница 1180: ...2...
Страница 1181: ...3...
Страница 1182: ...4...
Страница 1183: ...5...
Страница 1184: ...6...
Страница 1185: ...7...
Страница 1186: ...8...
Страница 1187: ...9...
Страница 1188: ......
Страница 1205: ...Section 24 LUBRICATION PA1564 5 FIGURE 1 LUBRICATION AND SERVICING POINTS ON INDEPENDENT FRONT SUSPENSION VEHICLES 24036_1...
Страница 1212: ......
Страница 1223: ...Section 26 XLII SLIDE OUT PA1564 11...
Страница 1224: ...Section 26 XLII SLIDE OUT PA1564 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION...