MTZ 952 - Hydraulic System; Rear Axle; Front Driving Axle

Specifications
MTZ series 900
30
Rear axle
Main gear: a pair of bevel gears with
circular sprocket teeth.
Final drive: a pair of cylindrical gears.
Differential: conical, four-satellite type.
Differential lock mechanism: hydraulic,
dry, friction coupling or multi-disk friction
coupling of ―wet‖ type (optional).
Brakes
Service: rear wheels: dry two- and three-
disk type with mechanical servo drive. Disk
diameter: 204 m m (o r 8-disk type operating
in an oil bath ( o ptional))
Parking: dry disk-type with mechanical
manual drive. Disk diameter: 180 m m (o r 4-
disk type operating in an oil bath ( o ption -
al)).
Front driving axle
Type : portal, with sliding housings of bevel
reducing gears (MTZ-920/952) o r portal,
with non-sliding bar, with planetary reduc -
ing gears (MTZ-920.2/952.2/920.3/952.3)
Main gear: bevel gears with auger teeth.
Differential type: self-locking, of higher
friction.
Final drive: wheel reduction gears with
straight bevel pairs (MTZ-
920.2/952.2/920.3/952.3).
Transmission oils: Тап-15В, ТСп-15К o r
ТСп-10 (SAE 80W-90); ТАД-1 7 И.
Drive: from transfer gear by two cardan
shafts with intermediate support.
FDA control: mechanical, by the lever for
operator’s right hand.
3 operating modes:
FDA is DISENGAGED;
FDA is ENGAGED forcedly;
F D A is ENGAGED/DISENGAGED auto -
matically.
Power take-off shaft (PTO) drive
Type: independent two-speed and syn -
chronous.
Master clutch: planetary reducing gear
with band brakes.
PTO control: mechanical (electro-
hydraulic – for tractors with a hydraulic
lift) by means of the lever at the right-
side control board.
PTO coupler shank speed:
Independent drive:
• 540 rpm at 2081 rpm of the diesel en-
gine (MTZ-900/920);
• 540 rpm at 1632 pm of the diesel en-
gine (MTZ-950/952);
• 1000 rpm at 2302 pm of the diesel en-
gine (MTZ-900/920)
• 1000 rpm at 1672 pm of the diesel en-
gine (MTZ-950/952)
Synchronous drive: 4.76 revolu-
tions/metre of travel with the rear tyres
16,9R38 mounted.
Removable PTO coupler shank: in ac-
cordance with the SAE standard with 6
splines for 540 rpm and 21 splines for
1000 rpm.
Rotation: clockwise as seen from the
shaft butt.
Hydraulic system
Type: universal, unit-principal, with in-
dependent power cylinder (MTZ-
900/920/950/952) or with hydraulic lift,
with two self-contained cylinders
(MTZ-900.3/920.2/920.3/
950.3/952.2/952.3).
Maximum pressure in the hydraulic
system: 18...20 MPa.
Distributor: spool valve type:
• Р80-3/4-222-ЗГг (Р80-3/4-111-ЗГг op-
tional);
• Р70-1221C; RS213 MTZ — for tractors
with power governor;
• РП70-1221; RS213 Mita flow-type —
for tractors with hydraulic lift.
Hydraulic system outlets: two side
and one rear outlets (drain one – op-
tional).
RMA control system has three operat-
ing modes:
• power;
• position;
• high-altitude.
Hydraulic system oil brands:
BECHEM Stariol №32;
ADDINAL Hydraulikol HLP 32;
THK Hydraulic HLP32.
Rear mounted attachment
Type: three-point mounted system of
category 2