greaves power tiller, model: gs 12 dlxsrfmtti.dacnet.nic.in/test reports upload 2012-13/367.pdf ·...

PT-27/367

GREAVES POWER TILLER, Model: GS 12 DLX – Comm.(ICT) i

SOUTHERN REGION FARM MACHINERY TRAINING & TESTING INSTITUTE - ANANTAPUR

Manufacturer

:

M/s GREAVES COTTON LTD., Petrol Engine Unit, F-62 & 63, SIPCOT Industrial Complex, GUMMIDIPOONDI – 601 201 (Tamil Nadu)

Test requested by

:

M/s GREAVES COTTON LTD., Petrol Engine Unit, F-62 & 63, SIPCOT Industrial Complex, GUMMIDIPOONDI – 601 201 (Tamil Nadu)

GREAVES POWER TILLER, MODEL: GS 12 DLX

Report No. PT-27/367 Month: SEPTEMBER Year: 2012

GOVERNMENT OF INDIA

SOUTHERN REGION FARM MACHINERY

TRAINING AND TESTING INSTITUTE

TRACTOR NAGAR

PO: GARLADINNE – 515 731 DISTRICT: ANANTAPUR (A.P)

Telephone No. 08551-286441 Fax No.08551-286441

Website: www.dacnet.nic.in/srfmtti E-mail: [email protected]

http://www.dacnet.nic.in/srfmtti

mailto:[email protected]

PT-27/367

GREAVES POWER TILLER, Model: GS 12 DLX – Comm.(ICT) 28


16 SUMMARY OF OBSERVATIONS, COMMENTS & RECOMMENDATIONS

16.1 Evaluative (mandatory)/ Non-evaluative (non-mandatory) parameters applicable for qualifying Minimum Performance Criteria as per Clause – 4.1 (Table-1) of IS: 13539: 2008 for acceptance of the power tiller for the purpose of subsidies / NABARD financing are summarized as under:

Sl. No.

Characteristics

Category (Evaluative

/Non Evaluative)

Require-ments as per IS: 13539: 2008

Values declared by

the applicant/Requirements

As observ

ed

Whether meets

the requirements (Yes/N

o) 1 2 3 4 5 6 7

16.1 Engine Performance:

a) Max. power under two hours test, ( kW )

Evaluative Declared value to be achieved with a

tolerance of -7.5/+15 percent of the declared value

8.8 9.0 Yes

b) Power at rated engine speed, (kW)

Non –evaluative ±5 % 8.8 9.1 Yes

c) Specific fuel consumption corresponding to max. power, ( g/kWh )

Non –evaluative

5% 285 353 No

d) Specific fuel consumption corresponding to rated power, ( g/kWh )

Non –evaluative

5% 285 346 No

e) Max. equivalent crankshaft torque, (Nm)

Non –evaluative 8% 37 38.4 Yes

f) Max. operating temperature (deg. C) :

- Engine oil Evaluative The declared value should not exceed the max. value specified by the oil company and observed value under high ambient condition should not

exceed the declaration

153 127 Yes

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-Coolant, (water) Evaluative The declared value should not exceed the boiling temperature of

coolant under pressurized condition or otherwise and the

observed value under high ambient condition should not exceed the

declaration.

145 84 Yes

g) Lubricating Oil consumption, (g/kWh)

Evaluative Not exceeding 1% of SFC at max. power under high ambient

condition

1% of SFC 0.35 Yes

h) Maximum coolant, (water) consumption, (% of total coolant capacity)

Non –evaluative

The observed value should not exceed the

maximum value specified by the

manufacturer when evaluated under high ambient conditions.

50% 3.48 Yes

i) Smoke level Evaluative Max light absorption coefficient of 3.25/m or equivalent Bosch No. 5.2 or 75 Hetridge value (As per CMVR)

--- 3.0 Yes

j) Overheating tendency of the engine

Evaluative Satisfactory completion of 2 hours test under high ambient condition.

--- Satisfac-

-tory Yes

16.2 Rotary shaft performance:

a) Max. Power test, (kW)

Evaluative Minimum 75 percent of observed maximum bhp for power tiller above 5 hp and 65

percent for the power tiller below 5 hp.

7.0 7.8 Yes

b) Power at rated engine speed,(kW)

Non –evaluative - 10% 7.0 7.8 Yes

c) Specific fuel consumption corresponding to power at rated engine speed,(g/kWh)

Non –evaluative

+ 10% 320 383 No

d) Max. equivalent rotary shaft torque, Nm

Non –evaluative 8% 340 322.8 Yes

e) Max. operating temp. of rotary transmission oil, (oC)

Non –evaluative

The observed value should not exceed the

maximum value specified by the manu.

120 60 Yes

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d) Rotary shaft speed change lever

Non-evaluative

100 m, max. 100 max 272

No

e) Steering clutch lever

Non-evaluative

100 m, max. 100 max 465 No

f) Accelerator lever

Non-evaluative

100 m, max. 100 max 302 No

g) Operator’s seat Non-evaluative

100 m, max. 100 max Not provide

d

---

h) Foot rest (if provided)

Non-evaluative

100 m, max. 100 max Not provide

d

NA

16.8 Haulage Performance:

a) Gross load of trailer (t)

Non-evaluative

-- 1.5 1.5 Yes

b) Distance traveled / liter of fuel consump-tion, (km)

Non-evaluative

-- 11 - 15 11.91

– 12.49

Yes

c) Fuel consumption, (cc/km/ tonne)

Non-evaluative -- 50 - 70

53.38 –

55.98 Yes

16.9 Wetland cultivation:

Suitability for Wetland Cultivation

Evaluative Effective sealing to be provided for engine

sump, clutch assembly, gear box,

chain case and rotary shaft housing Yes

No entry of

mud and /or water was

observed

(listed as per

Cl. 11.4.2)

Yes

16.10 Stationery operations:

Stationary operations

Evaluative Should have the provision for power outlet for stationery

operations or recommended

agricultural appliances

--

Provided

Yes

16.11 Discard limit (mm):

a) Cylinder bore diameter

Evaluative To be specified by the manufacturer in printed literature

92.20

94.02 Yes

b) Piston clearance


0.50

0.15

Yes

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c) Ring end gap:

- 1st Comp. Ring


1.5

0.45 To

0.50 Yes

- 2nd Comp. Ring


1.5 0.45 To

0.50 Yes

- 3rd Comp. Ring


1.5 0.45 To

0.50 Yes

-Oil ring Evaluative To be specified by the manufacturer in printed literature

1.5 0.35 To

0.40 Yes

d) Clearance of big end bearing:

-Diametrical Evaluative To be specified by the manufacturer in printed literature

0.10

0.03 Yes

- Axial Evaluative To be specified by the manufacturer in printed literature

0.56

0.15 Yes

e) Ring groove clearance:

- 1st Comp. Ring


0.15

0.04 Yes

- 2nd Comp. Ring


0.15

0.08 Yes

- 3rd Comp. Ring


0.15

0.09 Yes

- Oil ring Evaluative To be specified by the manufacturer in printed literature

0.15

0.09 yes

f) Thickness of clutch lining


Up to rivet head

1.2 To 1.9

Yes

g) Clearance of main bearing:

Diametrical clearance


Not applicable

Both side

Roller Bearin

g

--

Crankshaft end float


0.56

0.11 Yes

16.12 Safety requirements:

a) Provision of guards on moving parts other than rotavator.

Evaluative

Yes

Yes

Provided

Yes

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b) Location and direction of exhaust emission to be away from the operator and machine for stationary operation.

Evaluative

Yes

Yes Provid

ed

Provided

Yes

c) Covers on hot parts

Evaluative Yes Yes Provided

Yes

d) Locking of parking stand lever

Evaluative Yes Yes Provided Yes

e) Protective shield for rotavator to prevent flying of mud and stones

Evaluative Yes Yes

Provided

Yes

f) Accidental engaging of reverse speed gear when rotary is in operation.

Evaluative Yes

Yes

Provided

Yes

g)

Provision of head lights

Evaluative

Yes Yes

Provided

Yes

16.13 CATEGORY OF BREAKDOWNS/DEFECTS:

S. No. Characteristics

Category (Evaluative

/Non-evaluative)

Requirements as per IS: 13539-2008

As observed Whether meets

the requirements (Yes/No)

1. Critical Evaluative No critical breakdown None

Yes

2. Major Evaluative Not more than two and neither of them should

be of repetitive in nature

None

Yes

3. Minor Evaluative Not more than five and frequency of each should

not more than two. None

Yes

]

16.14 Salient Observations: 16.14.1 Engine Performance:

i) The backup torque is 5.8 % ii) The maximum brake horse power of the engine at 2400 rpm was

observed as 9.1 kW during maximum power two hours test.

16.14.2 Rotary shaft performance: 16.14.2.1 The maximum rotary shaft power was measured as 7.8 kW. 16.14.2.1 The maximum equivalent rotary shaft torque was measured as 322.8 Nm

against the declared value of 340 Nm.

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16.14.3 Drawbar performance test:

16.14.3.1 The power tiller could develop 4.2 kW at draw bar performance test in H1 gear corresponding to 15.0 % wheel slip. In none of the gears stalling tendency of the engine was noticed during the test, which indicates that the dynamic load on the driving wheels is not enough to generate sufficient pull to give maximum drawbar output. This should be looked into.

16.14.4 Mechanical Vibration:

The amplitude of mechanical vibration on some of the controls / measuring points of the power tiller exceeded the limit of 100 micron (Refer: Chapter-9). It should be dampened down to improve operational comfort and life of the components.

16.14.5 Noise measurement:

Max. noise at operator’s ear level was observed as 98 dB (A) and 84 dB(A) against the declared value of 98 dB(A) and 90 dB (A) respectively as specified by ILO. This calls for bringing down the noise level to improve operational comforts.

16.14.6 Haulage test

16.14.6.1 The power tiller could pull a two-wheel trailer of 1.5 tonne gross mass on the tar macadam road in H3 gear.

16.14.7 Puddling test 16.14.7.1 Puddling test was conducted with cage wheels and rotavator. 16.14.7.2 The maneuverability of power tiller during puddling test was found

satisfactory. 16.14.7.3 On partial dismantling of the power tiller and inspection of the oil samples

from engine, crankcase, transmission case and rotary chain case, no entry of mud and/water was observed in the rotary shaft bearing cap.

16.14.8 Rotavator blades:

i) The dimensions of the blades conform, in full, to IS: 6690-1981 (Re-affirmed in 2002).

ii) The hourly rate of wear for dry land and wetland operations were observed to be 0.19 to 0.39 and 0.15 to 0.29 percent respectively.

iii) Chemical composition of hatchet and straight blades as per the requirements of IS: 6690-1981. (Re-affirmed in 2002). (Results are awaited)

16.14.9.1 As per IS: 12239 (Part 3) – 1988, “maximum safe speed” with trailer is required to be specified by the manufacturer. Necessary action may be taken in this regard.

16.14.9.2 As per IS: 12239 (Part 3) – 1988, balancing mass to be added to achieve correct weight balance of the power tiller with various attachments should be recommended by the manufacturer in the operator manual. This may be examined for compliance.

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