PT-9/273

DIVYA SHAKTI POWER TILLER, Model: DIVYA SHAKTI – Comm. (ICT) i

SOUTHERN REGION FARM MACHINERY TRAINING & TESTING INSTITUTE - ANANTAPUR

Manufacturer : M/s Changzhou Dongfeng Agricultural Machinery Group Co. Ltd., No. 10, Xinye Road, Changzhou, Jingsu, CHINA

Test requested by : M/s Chirag Corporation, 33/1. N. S. ROAD, KOLKATA – 700 001 West Bengal

DIVYA SHAKTI POWER TILLER, Model: DIVYA SHAKTI

Report No. PT-9/273 Month: December Year: 2009

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: fmti-sr@nic.in

PT-9/273

DIVYA SHAKTI POWER TILLER, Model: DIVYA SHAKTI – Comm. (ICT) 28

SOUTHERN REGION FARM MACHINERY TRAINING & TESTING INSTITUTE - ANANTAPUR

- Condition of clutch release bearing.

: Normal

- Condition of pilot bearing : Normal

- Condition of pressure plate : Normal

- Presence of oil and water in clutch housing

: None

- Height of lining over rivet head, (mm)

: 1.4 to 2.4 Against the discard limit of wear up to rivet head

15.3 Transmission gears: All the gears of the transmission system were in normal working condition. 15.4 Brakes: The brake assembly was dismantled and all the components were found

in normal working condition. 15.5 Rotary drive unit: The rotary drive unit was dismantled and all the components were found

in normal working condition.

15.6 Steering system: All the components of the steering clutch assemblies were inspected and

found in normal working condition.

15.7 Magneto: All the components of Magneto assembly was inspected and found in

normal working condition.

16 SUMMARY OF OBSERVATIONS, COMMENTS & RECOMMENDATIONS

Sl. No.

Characteristics Require-ments

Tolerance as per IS:

13539-2008

As observed

Whether within

the tolerance

limit (Yes/No)

1 2 3 4 5 6.

16.1 Engine Performance:

i) Max. power under two hours test, ( Kw ) 9.0

-7.5 +15 %

9.1 Yes

ii) Power at rated engine speed, ( Kw ) 9.0 5% 9.1 Yes

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

275.6 5% 277 Yes

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

275.6 5% 277 Yes

v) Max. crankshaft torque, (Nm) 44.2 8% 50.4 No

PT-9/273

DIVYA SHAKTI POWER TILLER, Model: DIVYA SHAKTI – Comm. (ICT) 30

SOUTHERN REGION FARM MACHINERY TRAINING & TESTING INSTITUTE - ANANTAPUR

1 2 3 4 5 6. iii) Observation on rotation of

drive wheels at the slope of 12% with trailer having gross mass same as of power tiller or 1 tonne whichever is less.

--do-- - --do-- Yes

16.5 Air cleaner oil pull over, (mass basis) (maximum %)

0.25 - 0.15 Yes

16.6 Noise level:

i) Maximum ambient noise emitted by the power tiller, dB (A) at bystander’s level

90

--

83 Yes

ii) Maximum noise at operator’s ear level, dB (A)

90

-- 96 No

16.7 Amplitude of mechanical vibration at (microns)

i) Steering handle grips 100 max. -- 235 No

ii) Gear levers 100 max. -- 118 No

iii) Rotary shaft speed change lever

100 max. -- 96 Yes

iv) Accelerator lever 100 max. -- 298 No

v) Clutch / brake lever(s) 100 max. -- 325 No

16.8 Haulage Performance:

i) Gross load of trailer (tonne)

1.5 -- 1.5 Yes

ii) Distance traveled / liter of fuel consumed, (km)

11 to 14 -- 11.13 to

11.38 Yes

iii) Fuel consumption, (cc/km/ gross load tonne)

71 to 80 -- 58.59 to

59.89 Yes

16.9

Suitability for Wetland Cultivation

Yes The entry of

mud/water should not take place

in component

/sub assemblies

No entry of mud and /or water was observed (listed as per cl.11.4.2)

Yes

16.10 Discard limit (mm): i) Cylinder bore diameter 100.00 -- 100.04 No

ii) Clearance between piston & Cylinder liner

0.43

--

0.20

Yes

PT-9/273

DIVYA SHAKTI POWER TILLER, Model: DIVYA SHAKTI – Comm. (ICT) 31

SOUTHERN REGION FARM MACHINERY TRAINING & TESTING INSTITUTE - ANANTAPUR

1 2 3 4 5 6. iii) Ring end gap: - 1st Comp. Ring 2.9

-- 0.43 to 0.48

Yes

- 2nd Comp. Ring 2.9 --

0.78 to 0.88

Yes

-Oil ring 2.9 --

0.48- 0.50

Yes

iv) Ring groove clearance: - 1st Comp. Ring 0.5 - 0.05 Yes - 2nd Comp. Ring 0.5 - 0.04 Yes - Oil ring 0.5 - 0.05 Yes v) Clearance of big end

bearing:

-Diametrical 0.24 - 0.21 Yes - Axial 0.80 - 0.76 Yes vi) Crankshaft end float 0.25 - 0.15 Yes vi) Height of clutch lining

over rivet head

Up to rivet head -

1.4 to 2.4 Yes

16.11 Safety requirements: i) Provision of guards on

moving parts other than rotavator.

Provided --

Provided Yes

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

Provided

--

Provided

Yes

iii) Covers on hot part Provided -- Provided Yes iv) Locking of parking stand

lever Provided -- ------ Yes

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

Provided --

Provided Yes

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

Provided --

Provided Yes

vii) Provision of light(s) Provided -- Provided Yes ]

16.12 Salient Observations: 16.12.1 Engine Performance:

i) The backup torque is 16.1% ii) The maximum brake horsepower of the engine at 2000 rpm was observed

as 9.1 kW. iii) The coolant water consumption was observed as 21.5 % of total coolant

capacity during two hours maximum power test. The observed value is considered on higher side.

16.12.2 Rotary shaft performance: The maximum rotary shaft power was measured as 7.5 kW 16.12.3 Drawbar performance test: 16.12.3.1 The power tiller could develop 3.4 kW power at draw bar performance test

in H1 gear corresponding to 15.4 % wheel slip. In none of the gears

PT-9/273

DIVYA SHAKTI POWER TILLER, Model: DIVYA SHAKTI – Comm. (ICT) 32

SOUTHERN REGION FARM MACHINERY TRAINING & TESTING INSTITUTE - ANANTAPUR

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.

16.12.4 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.

16.12.5 Noise measurement: Max. noise at operator’s ear level was observed as 96 dB (A) which is on

higher side against warning and danger limit of 85 dB(A) and 90 dB (A) respectively as specified by ILO. This calls for bringing down the noise level to improve operational comforts.

16.12.6 Haulage test 16.12.6.1 The power tiller could pull a two-wheel trailer of 1.5 tonne gross mass on

the tar macadam road in H3 gear.

16.12.7 Puddling test 16.12.7.1 Puddling test was conducted with cage wheels and rotavator. .16.12.7.2 The maneuverability of power tiller during puddling test was found

satisfactory. 16.12.7.3 On partial dismantling of the power tiller and inspection of the oil samples

from engine, crankcase, transmission case and rotary chain case. No ingress of water and / or mud was noticed at any assembly of the power tiller

16.12.8 Rotavator blades:

i) The dimensions of the blades do not conform, in full, to IS: 6690-1981 (Re-affirmed in 2002).

ii) The hourly rate of wear of straight blade and Hatchet blade were observed to be 0.34 to 0.83 and 0.14 to 1.00 percent respectively.

iii) Chemical composition of hatchet blades and straight blades does not meet in full, the requirements of IS:6690-1981. (Re-affirmed in 2002).

16.12.9.1 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.

16.12.9.2 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.

16.12.9.3 Provision of spark arresting device may be considered for incorporation in the exhaust system.

16.12.9.4 During the field test, silencer got broke and replaced with new one. The cracks were developed on the newly fitted silencer and got repaired. This calls for the use of better quality material/spares.

16.12.10 General observation: 16.12.10.1 The handle grip does not meet the requirement of IS: 11858 – 1986. This

may be looked into for compliance. 16.12.10.2 Provision for draining of sediment/water in fuel tank may be provided to

check contamination /impurities in fuel.