Volvo Service Manual TP 15052/1

Group 70 General

Specifications

Frame

Length,B10M-55 LHD9600 mm
 B10M-60 LHD10100 mm
 B10M-65 LHD10600 mm
 B10M-56 RHD9739 mm
 B10M-61 RHD10196 mm
Width970 mm
Number of crossmembers5
Width of crossmembers2350 mm
Side members,width of flange80 mm
 max. height240 mm
 material thickness6 mm

Leaf Springs

Front Springs

P/N 1135871

TypeSemi-elliptical leaf spring
Length between eye centres at load of 27753 N (2830 kgf)1600±3 mm
Width100 mm
Number of leaves13
Thickness of leaves:
 Leaf 112 mm
 Leaves 2-311 mm
 Leaves 4-1310 mm
Test values:
Loading for a deflection of 10 mm2227 N (227 kgf)
Loading for a negative deflection of 3 mm (first loaded 3 times to negative deflection of 175 mm)28440±1700 N (2900±174 kgf)

P/N 1190086

TypeParabel spring
Length between eye centres1600±3 mm
Width99±0.3 mm
Number of leaves3
Thickness of leaves:
 Leaves 1-3Thickness varies between 11 and 21 mm
Test values:
Loading for a deflection of 10 mm2227 N (227 kgf)
Loading for a negative deflection of 3 mm (first loaded 3 times to negative deflection of 175 mm)28440±1700 N (2900±174 kgf)

Rear Springs

P/N 1135804

TypeSemi-elliptical leaf spring
Length between eye centres at load of 35000 N (3570 kgf)1850±3 mm
Width100 mm
Number of leaves12
Thickness of leaves:
 Leaf 114 mm
 Leaf 213 mm
 Leaves 3-1212 mm
Test values:
Loading for a deflection of 10 mm2256 N (230 kgf)
Loading to a negative deflection of 10 mm (first loaded 3 times to negative deflection of 200 mm)37265±2235 N (3800±230 kgf)

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P/N 1190098

TypeParabel spring
Length between eye centres1850±3 mm
Width99±0.3 mm
Number of leaves3
Thickness of leaves:
 Leaves 1-3Thickness varies between 12 and 25 mm
Test values:
Loading for a deflection of 10 mm2256 N (230 kgf)
Loading to a negative deflection of 10 mm (first loaded 3 times to negative deflection of 200 mm)37265±2235 N (3800±230 kgf)

Air Suspension

Number of air bellows,front2
 rear4
Working pressure at full load,front570-630 kPa (5.7-6.3 kgf/cm2)
 rear610-710 kPa (6.1-7.1 kgf/cm2)
Air bellows, rear
 volume in piston2.75 dm3
 volume in bellows9.25 dm3
 outer diameter, bellows installed290 mm
 bellows height249±3 mm1)
Air bellows, front
 volume in piston3.90 dm3
 volume in bellows8.85 dm3
 bellows height249±3 mm1)
 outer diameter, bellows installed296 mm
Shims for compensating level difference between rear axle's front and rear air bellows2 mm, 4 mm
Level difference, max.6 mm
Change in level difference with
 2 mm shims, upper stay11.3 mm
 4 mm shims, upper stay22.6 mm
 2 mm shims, lower stay8.7 mm
 4 mm shims, lower stay17.4 mm
1) The distance is measured between the underside of the bellow-piston and the underside of the upper attaching plate.

Level valves

Number3
Level valve,frontBosch 0 500 005 007
 rear,leftBosch 0 500 005 006
 rightBosch 0 500 005 007
Check valve for level valvesBosch 0 500 100 007
Air filter for level valvesBosch 1427 432 000
Oil typeMIL-H-5606 (e.g. Esso Univis)
Oil capacity, approx.0.05 litres (dm3)

Four-circuit protection valve

Make and designationWestinghouse A 9347020420

Manual level regulation

Working cylinder, typePneumatic
Number3
Solenoid valve (1), typeElectro-pneumatic
Body clearance elevation50 mm

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Shock Absorbers

 Leaf springs (BLF) (see Note)
 Standard typeSpecial type Koni
 FrontRearFrontRear
TypeTelescopicTelescopic
P/N1137026113702811370271137029
Colour markingYellowBlueYellowBlue
Diameter,protection tube83 mm70 mm80 mm80 mm
 container tube72 mm57 mm70 mm70 mm
Length between attaching centres
 compressed.405 mm438 mm407 mm437 mm
 extended630 mm1)683 mm2)633 mm2)693 mm2)
Prior to the shock absorber's fully pulled out length, a hydraulic brake device functions as follows:
1) 9-13 mm
2) approx. 20 mm
Note: Concerns conventional springs; for parabel springs the shock absorbers on front air springing apply.

 Air suspension (LUF)
 Standard typeSpecial type Koni
 FrontRearFrontRear
TypeTelescopicTelescopic
P/N1136643113664411347481134749
Colour markingRedBlackRedBlack
Diameter,protection tube83 mm64 mm80 mm80 mm
 container tube72 mm58 mm70 mm70 mm
Length between attaching centres
 compressed405 mm415 mm407 mm417 mm
 extended630 mm1)655 mm2)633 mm2)653 mm2)
1, 2) See footnotes above.

Wheels

Hubs

Axial clearance, front and rear wheel bearing0.04-0.12 mm

Rims

Type,alt. 1Disc rim
 alt. 2Drop-centre rim (for tubeless tyres)
 alt. 3Divided rim for spoke wheels (Trilex)
 alt. 4Drop-centre rim for spoke wheels (Tubelex)
Sizes,alt. 1 and alt. 37.5x20"; 8.0x20"
 alt. 2 and alt. 48.25x22.5"
Radial throw (out-of-round), max.2 mm
Lateral throw, max.2 mm

Tyres

 Alt 1 and 3Alt 2 and 4
Size11.00-20"
12.00-20" (8.0x20 rim)
12-22.5"

Air pressure

The tyre pressure must be adapted to the bus coach structure and load on respective axle.

The values below are only guide values. For more exact pressures, refer to the recommendations of the various tyre manufacturers.

 Recommended tyre pressure bar (kgf/cm2)
Tyre sizePly ratingFrontRear
11.00-20"168.0 (8.2)7.0 (7.1)
12.00-20"167.5 (7.7)6.5 (6.6)
12-22.5"168.0 (8.2)7.0 (7.1)

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Tightening torques

 NmKgf m
Lock nuts, front wheel hubs, M5030030
Lock nuts, rear wheel hubs30030
Wheel nuts, disc wheels, 7/8"62562.5
 type low nut62562.5
Wheel nuts, spoke wheels, M2032032
 Spring bolt (BLF)39039
Nuts, U-bolts (leaf springing)68568.5
U-bolts, rear axle (air springing)68568.5
 Retaining bolts, front axle attachment*) (air springing)68568.5
 Retaining bolts, reaction rods858.5
 Retaining bolts, reaction rod brackets10010
 Retaining bolts, anti-roll bar attachments464.6
 Shock absorber bolts14014
 Nut, shock absorber lower attachment24524.5
 Nut (behind front axle), shock absorber attachment45045.0
 Nut (bracket, rear axle), shock absorber attachment (BLF only)24524.5
*) To avoid possible damage to air bellows with hefty spring deflection, the two front retaining bolts in the front axle attachment must be mounted in a determined position, see Fig. below.

Volvo B10M Mk 1 Position of front retaining bolts in the front axle attachment

Special tools

Special tools, Air-suspension system

999 (SVO)
2788Connection nipple 7/16¨-24 UN (two)
2795Test instruments
2800Test bench for checking and adjusting air-suspension valves

Volvo B10M Mk 1 Air suspension special tools 2788 2800  Volvo B10M Mk 1 Test bench 2795 for air-suspension valves

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The following tools are not supplied by Volvo but are made according to the sketches below. Their use is described in the section "Service Procedures".

Fixture for testing and adjusting level valve.

Note: Service Bulletin 7-72-08 'Shorter lever when testing level valve in fixture' may apply.

Volvo B10M Mk 1 Fixture for level valves
A. Studs, M8

Details for fixture

Volvo B10M Mk 1 Fixture for level valves stop sleeve  Stop sleeve

Volvo B10M Mk 1 Fixture for level valves stop bolt  Stop bolt

Volvo B10M Mk 1 Fixture for level valves Stud M8  Stud M8

Volvo B10M Mk 1 Fixture for level valves Adjusting drift  Adjusting drift

Centering washer for diagonal measurement of air-suspension members.

Volvo B10M Mk 1 Fixture for level valves centering washer
A. Weld beads

Composition of connection nipple for function test of air-suspension system.

Volvo B10M Mk 1 connection nipple for air-suspension
1.Connection nipple 2788
2.T-piece 180084-6
3.Nut 954356-2
 Cone 954364-6
 Sleeve 944717-8
4.Plastic tube 955460-1, approx. 80 mm

Composition of connection nipple for testing check valve.

Volvo B10M Mk 1 connection nipple for check valve
1.Connection nipple 2788
2.Union 945901-7
3.Sealing washer 947282-0
4.Check valve
5.Intermediate section, length 25 mm, internal thread M12x1.5

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Special tools for reaction rods (LUF) and anti-roll bars (LUF and BLF).

Volvo B10M Mk 1 Suspension reaction rod special tools  Volvo B10M Mk 1 Suspension anti-roll bar special tools

999 (SVO)
6616Support ring for reaction rod when pressing bushing in and out
6617Hollow. drift for pressing: reaction rod bushing in and out
6618Hollow drift for pressing anti-roll bar bushing in and out
6619Support ring for anti-roll bar when pressing bushing in and out.

Special tools for leaf springs (BLF)

The following tools are not supplied by Volvo but are made according to the sketches below. Concerning their use refer to the section "Service Procedures".

Volvo B10M Mk 1 Sleeve for pressing in spring bushing  Sleeve for pressing in spring bushing

Volvo B10M Mk 1 Support ring for spring eye  Support ring for spring eye

Special tools for working on wheels and hubs
Volvo B10M Mk 1 Wheels and hubs special tools part 1

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Volvo B10M Mk 1 Wheels and hubs special tools part 2 Volvo B10M Mk 1 Wheels and hubs special tools part 3

999 (SVO)
2000Standard handle
2063Puller for removing rear wheel hubs
2337Lever for removing sealing rings, etc.
2434Tool for fitting wear ring, inner rear wheel bearing. Also for fitting seal on lock nut for rear wheel hub
2500Hollow drift for fitting inner ring, inner front wheel bearing
2576Puller for removing inner ring, inner front wheel bearing
2625Adapter for removing inner ring, inner front wheel bearing
2631Adapter for removing outer ring, outer rear wheel bearing
2646Adapter for removing outer bearing outer ring, front wheel bearing
2676Puller for removing wear ring and inner ring, inner rear wheel bearing
2871Ring for fitting wear ring, rear wheel hub
2950Stand for dial indicator
6173Adapter for removing outer ring, inner front wheel bearing. Also for fitting outer ring, outer front wheel bearing
6175Adapter for fitting sealing ring, front wheel hub. Also for fitting outer ring, inner rear wheel bearing, and for fitting sealing ring, rear wheel hub
6176Adapter for removing outer ring, inner rear wheel bearing, and for fitting outer ring, outer rear wheel bearing
6224Press tool for replacing wheel studs
6225Drift for pressing in wheel studs
6257Spanner socket for hub caps, width across flats 102 mm
6258Pin spanner for adjusting nut, front wheel hub
6261Puller for removing front wheel hub
6335Sleeve for pressing in wheel studs 6443 Spanner socket for nut, rear wheel hub

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