gf2755p1000b

Transmission cooling, basic function

Type gf · emne 27.55 · version 0102 · 2020-06-23

Gælder for: Model all with transmission 725.0/1

Ikke tilgængelig på “da”; vises på Engelsk.

Placering

Funktionsgruppe 2 Chassis › 27 Automatgearkasse › 27.55 Gearkasseoliekøling — Serie 900 (modeller 9**) · Serie 902 (modeller 9**) · Serie 904 (modeller 918, 919, 924, 925, 938, 943, 957) · Serie 906 (modeller 917, 918, 924, 953)

Gælder også for motorer/gearkasser: 139 ***, 254 ***, 256 ***, 272 ***, 276 ***, 282 ***, 457 9**, 541 9**, 542 9**, 608 ***, 700 4**, 700 420, 700 421, 700 422, 700 423, 715 3**, 715 5**, 722 6**, 722 9**, 724 ***, 724 0**, 724 033, 724 044, 724 045, 724 1**, 724 103, 724 114, 724 115, 724 120, 725 ***, 725 0**, 725 035, 725 037, 725 038, 725 085, 725 1**, 739 390, 739 391, 739 395, 739 396, 739 397, 739 398, 739 399, 740 698, 743 3**, 743 4**, 743 498, 746 971, 924 9**, 924 910, 925 9**, 926 9**

GF27.55-P-1000B

Transmission cooling, basic function

22.06.2020

Model

all with transmission 725.0/1

Transmission cooling, basic function

Transmission oil cooling circuit

1

Oil cooler

2

Additional oil cooler

3

Oil thermostat

A

Transmission oil feed line

B

Transmission oil return line

P27.55-2236-76

Overview

This document contains information on:

General

Function requirements

Function

General

Transmission oil cooling is tasked with the function of maintaining a constant transmission oil temperature. This prevents overheating damage to the automatic transmission.

Function requirements

Ignition ON (circuit 15)

Engine in operation

Function

The transmission oil is drawn out of the oil pan by a mechanical pump in the automatic transmission and then pumped to the oil thermostat via the feed. At a transmission oil temperature  <  90 °C, the oil thermostat routes the transmission oil back to the automatic transmission via the return line. At a transmission oil temperature of  >  90 °C, the oil thermostat opens and transmission oil flows through the additional oil cooler and the oil cooler before it flows back to the automatic transmission through the return line.