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: [email protected]
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.