IS 13549: Tractors and machinery for agriculture and forestry - Hydraulic coupling - Braking circuits

9 Pages·1992·0.84 MB·English

by  Bureau of Indian Standards

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IS 13549 (1992): Tractors and machinery for agriculture and
forestry - Hydraulic coupling - Braking circuits [FAD 11:
Agricultural Tractors and Power Tillers]
“!ान $ एक न’ भारत का +नम-ण”
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SI 13549 : 2991
IS0 5676 : 1983

Indian Standard
SROTCART DNA YRENIHCAM ROFERUTLUCIRGA
DYNRATSEROF - GNILP UCOICLUARDYH -
GNIKARB STIUCRIC
UDC 631’372-59 : 629’114’2’013’5

@ SIB2991
B U R E A U O F I N D I A N S T A N D A R D S
MANAK BHAVAN, 9 BAHADUR SHAH RAFAZ MARG
NEW DELHI 110002
November 1992 Price Group 1
Agricultural Tractors and Power Tillers Sectional Committee, FAD 32
NATIONAL FOREWORD
This Indian Standard, which is identical with IS0 5676 : 1983 ‘Tractors and machinery for
agriculture and forestry - Hydraulic coupling - gnikarB ,’tiucric deussi yb eht lanoitanretnI
Organization for Standardization ( IS0 ) saw detpoda yb eht uaeruB fo naidnI sdradnatS noeht
recommendation of the Agricultural Tractors and Power Tillers Sectional Committee ( FAD 32 )
and approval of the Food and Agriculture Division Council.
nI eht detpoda dradnats niatrec ygolonimret dna snoitnevnoc era ton lacitnedi htiw esohtdesu
in the Indian Standards; attention is drawn specially to the following:
a) Comma ( , > has been used as a decimal marker while in Indian Standards the current
ecitcarp si ot esu a tniop ( . ) as the decimal marker.
b) Wherever the words ‘international Standard’ appear, referring to this standard, they
should be read as ‘Indian Standard’.
SSORCSECNEREFER
nI siht naidnI ,dradnatS eht gniwollof lanoitanretnI sdradnatS era derrefer .ot daeR ni rieht
place the following:
International Standard Corresponding hdian Standard Degree of
Correspondence
0SI 2082 : 1986 Metallic coatings - IS 1572 : 1986 Electroplated coat- Technically
Electroplated coatings of cadmium ings of cadmium on iron and equivalent
on iron and steel steel
IS0 3104 : 1975 Petroleum Products SI 8441 [ P : 25 ] : 6791sdohteM Technically
- Transparent and opaque liquids of test for petroleum and its equivalent
- Determination of kinematic vis- products : [ P : 25 ] Determina-
cosity and calculation of dynamic tion of kinematic and dynamic

viscosity ytisocsiv ( tsrif noisiver)

The technical committee responsible for the preparation of this Indian Standard has reviewed
eht snoisivorp fo eht gniwollof IS0 standard and has decided that it is acceptable for use in
noitcnujnoc htiw siht dradnats :
IS0 5675 : 1981 Agricultural tractors and machinery - Hydraulic couplers for
general use
SI 13549 : 1992
IS0 5676 : 1983
Indian Standard
SROTCART DNA YRENlHCAnR ROFERUTLUCIRGA
YRT SDENRAOF - CILUARDYH GNILPUOC -
GNIKARB CIRCUITS
1 Scope 3 References
This international Standard specifies the conditions for inter- IS0 2082, Metallic coatings - Electroplated coatings of cad-
changeability, and the operating characteristics and lays down mium on iron or steel.
the technical specifications for tests, for the hydraulic coup-
lings on braking systems for towed agriculture and forestry IS0 3104, Petroleum products - Transparent and opaque
machinery. liquids - Determination of kinematic viscosity and calculation
of dynamic viscosity.
2
Field of application IS0 5575, Agricultuml tractors and machinery - Hydraulic
couplers for general use - Specifications.
This International Standard applies solely to hydraulic brake
couplings.
4 Definitions
The braking system is of a regulatable type, operated by an in-
crease in pressure within a service pressure range of between See IS0 5675.
10 and 15 MPa (100 and 150 bar).
These devices are used to connect or disconnect the braking 5 Dimensional characteristics
circuit each time trailed agricultural or forestry machinery is
hitched or unhitched. The coupling shall conform with the figure.
Dimensions in millimetres
O(7 max.

Optional groove

k
~~ Rcunded angle
:
Fixed part Movebla p8rt :
Male part fixed on the female p8rt fixed to the
tractor trailed vehicle
NOTE ~ The sole aim of the configuration of The coupling is to illustrate and give the reference dimensions. It is not intended to convey daslgn
requirements.

Figure -- Dimensions of the hydraulic coupler
1
SI 13549 : 1992
IS0 5676 : 1963
6
Operating characteristics and technical 6.2.3 Testing of the male and female parts with
specifications hydraulic fluid
The following tests shall be carried out using a hydraulic fluid of
6.1 Operating characteristics high fluidity with viscosity of
- not less than 10 mmVs (10 cSt1)) at 54.4 “C,
6.1.1 Pressures ~ not greater than 500 mm2/s EOO cSt) at -40 OC (see
IS0 3104).
The normal service pressure shall be 15 MPa (150 bar) max-
imum.
6.2.3.1 Hydrauliq test pressure
When the tractor is operated without a trailer, the unconnected :
Apply a pressure of 22,5 MPa (225 bar) for 5 min
male part shall be able to withstand the maximum permissible
-
service pressure of 15 MPa (150 bar). to the male part,
- to the female part alone,
Connection and disconnection of the coupling device should
normally only be carried out without pressure in the circuit. - to the connected male and female parts.
Under these conditions, the disconnecting force applied to the No leakage, permanent distortion or disconnection shall be
locking ring shall be less than 45 N. For connecdon, a force of observed.
less than 150 N shall be applied to the body of the ferriale part.
6.2.3.2 Loss of oil and intake of air on coupling
6.1.2 Temperature Connect the male part and female part to the testing bench by
flexible tubing and subject them to a pressure of 0,Ol MPa
The operating temperatures shall be between -30 OC and (0,l bar).
100 OC with possible peaks at 140 ‘X and shall last not more
than 1 h. After coupling and uncoupling 100 times in the horizontal posi-
:
tion at a temperature of 20 f 5 OC, it shall be verified that
-
total oil loss has not exceeded 5 ml.
6.2 Technical specifications
6.2.3.3 Loss of pressure
6.2.1 Seals
For an output of 20 I/min under a pressure of 15 MPa (150 bar)
The seals shall be compatible with the oils used in agriculture at a temperature of 20 + 5 OC, the loss of pressure shall not
and under the operating conditions specifi ed in 6.1. exceed 0,2 MPa (2 bar).

6.2.2 Protection 7 Fixing of the male half of the coupling
The external parts shall be protected by cadmium cbating 8 to The male part of the coupling shall be mounted on the tractor
12 pm thick or by any other material giving similar protection. facing backwards.

1) 1 cSt (centistokes) = 1 mm21s
-_____.. .~
2 Reprography ,tinU BIS, New Delhi, India
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