Specifications, mechanical: Specifications

Make

Volvo

Model

S90 Factory Service Manual

Year

1997–1998

Section

50 General › Specifications, mechanical › Specifications

5 BrakesSpecifications

Specifications

Specifications, mechanical

General

Service plate

Earlier location: On upper front member in luggage compartment.

Later location: On left-hand rear doorpost.

The plate provides the following information:

Part	Manufacturer	Code
Brakes	Girling, front and rear	1
	Girling, front; ATE, rear	2
	Bendix (DBA), front; ATE, rear	3

Brake fluid

Grade …

DOT 4+

Front brakes

Type …

Disc

Brake disc

Version 1	Solid	o.d./new thickness/min. thickness …	280/14/11.5 mm
Version 2	Ventilated	o.d./new thickness/min. thickness …	262.4/22/20 mm
Version 3	Ventilated	o.d./new thickness/min. thickness …	287/22/20 mm
Version 4	Ventilated	o.d./new thickness/min. thickness …	280/26/23 mm

Lateral runout with disc mounted on hub (see General) …

max. 0.06 mm

Brake caliper

Brake caliper	Sliding
Versions 1,2 and 3 as above: No. of pistons per caliper/diameter …	2/40mm
Version 4 as above: No. of pistons per caliper/diameter …	1/57 mm

Brake pads

Versions 1,2 and 3 as above: area/thickness …	44 cm 2/11 mm
Version 4 as above: area/thickness …	52 cm2/12 mm
Min. permissible pad thickness …	3 mm

Rear brakes

Type

Type …

Disc

Brake disc

Version 1	Live rear axle	o.d./new thickness/min. thickness …	281/9.6/8.4 mm
Version 2	Multilink	o.d./new thickness/min. thickness …	265/10/8 mm

Lateral runout

Version 1: disc mounted on car …	max. 0.08 mm
Version 2: disc mounted on car …	max. 0.06 mm

Brake caliper, type

Version 1 as above …		Fixed
Version 2 as above …		Sliding
Number of pistons per caliper/diameter (version 1) …		2/36, 38, 40 mm
	(version 2) …	1/38, 40 mm

Brake pads

Version 1 as above: area/thickness …	25 cm2/10 mm
Version 2 as above: area/thickness …	26 cm2/8 mm
Min. permissible lining thickness …	2 mm

Master cylinder

Type, cars without ABS …	Tandem (Twintax)
Type, cars with ABS …	Tandem

	Earlier version	Later version
Primary cylinder (cars without ABS), nominal diameter …	22.3 mm	23.81 mm
Secondary cylinder (cars without ABS), nominal diameter …	15.75 mm	16.84 mm
Primary cylinder (cars with ABS), nominal diameter …	22.20 mm	23.81 mm
Secondary cylinder (cars without ABS). nominal diameter …	19.05 mm	20.64 mm

Brake servo

Type …

DBA 2x8" or 10"

	Earlier version	Later version
Ratio …	1:3.5	1:4.0
Pedal travel with engine switched off (depress pedal 3-4 times before measuring) …	max. 55 mm

Reducing valve

5-door, 4-cyl. models …	3.5 MPa
Other models …	2.5 MPa

Parking brake

Brake drum,	diameter …	160 mm
	radial out-of-truth …	max. 0.15 mm
	ovality …	max. 0.2 mm
Brake linings, effective area …		168 cm2
Full power should be reached when brake lever is …		tightened by 4-7 notches

NOTE: Wheels should be rotatable by hand when brake lever is tightened by two notches.

Wheels should be locked when brake is tightened by four notches.

06 Brakes