Hydraulic System - Cx75Sr, Cx80; Hydraulic System - Cx135Sr; Hydraulic System - Cx135Sr; Control Valves - Case CX75SR Operator's Manual

Variable flow double pumps, with axial pistons supplying the attachments, the swing and the travel.
Main pump max flow ................................................................................................ 2 x 71.4 l/min. (2 x 18.9 gpm)
Single pump supplying the dozer blade
Dozer blade pump max flow...................................................................................................25.4 l/min. (6.7 gpm)
Safety valves pressure
Attachments ..............................................................................................................................294 bar (4,264 psi)
Swing ........................................................................................................................................226 bar (3,277 psi)
Travel .........................................................................................................................................294 bar (4,264 psi)
Dozer blade ...............................................................................................................................226 bar (3,277 psi)

CONTROL VALVES

Five control valve sections for left-hand travel, boom, arm, auxiliary circuit and swing acceleration.
Four control valve sections for right-hand travel, boom, arm and bucket acceleration.
(CX75SR) Two sections for dozer blade and offset boom.
(CX80) Two sections for dozer blade and equipment offset.
Boom/arm load holding valves.

SWING

Fixed flow, piston-type pump.
upperstructure swing speed .........................................................................................................................10 rpm

TRAVEL

Variable flow hydraulic motors with axial pistons.
Planetary reduction gears.
Two speeds controlled from the instrument panel.
Low speed ...................................................................................................................0 to 3.4 km/h (0 to 2.1 mph)
High speed .....................................................................................................................0 to 4.9 km/h (0 to 3 mph)
Variable flow double pump with axial pistons.
Max flow ................................................................................................................. 2 x 117.2 l/min. (2 x 30.9 gpm)
Safety valve max pressure.
Attachment ................................................................................................................................343 bar (4,974 psi)
upperstructure swing .................................................................................................................280 bar (4,061 psi)
Travel .........................................................................................................................................343 bar (4,974 psi)
CONTROL VALVES
Four control valve sections for left-hand travel, boom/bucket and arm acceleration.
Five control valve sections for right-hand travel, swing, arm, auxiliary attachment and boom acceleration.
Boom/arm load holding valves.
SWING
Fixed flow, piston-type pump.
Max upperstructure swing speed .................................................................................................................10 rpm
TRAVEL
Variable flow hydraulic double motors with axial pistons.
Planetary reduction gears, automatic multiple disk brake.
Two speeds controlled from the instrument panel.
Low speed ...................................................................................................................0 to 3.2 km/h (0 to 1.9 mph)
High speed .....................................................................................................................0 to 5 km/h (0 to 3.1 mph)
8-4
CHAPTER 8 - SPECIFICATIONS

HYDRAULIC SYSTEM - CX75SR, CX80

HYDRAULIC SYSTEM - CX135SR

Issued 8-04 Bur 6-34551NA