〉〉〉Usage & Feature
The pump can be divided into two parts, one is steel tensile machine driving, and the other is operation. It’s not only matched for stressing equipment driving of YDCW9000,YDCW4000,YDCW2500,YDCW1500,YDCW1000,YDCW600,YC600,YL600,YZ600,YZ850,LD100,LD200 etc, but also used for all kinds of low-flow & high pressure hydraulic equipment. It adopts dual oil and reliable cooperation system.

Specification

Rated oil pressure	50MPa	Oil Nozzle Number	2
Rated Discharge Capacity	2×2L/Min	Oil Kinds	Summe:HJ32
Plunger Qty	2×3		Winter:HJ15
Plunger Diameter	φ10mm	Tank Capacity	50L
Motor Model	Y100L₂-4B5	Weight	120KG
Power	3.0KW	Appearance Size	660×494×1080mm
Revolution	1430R/Min		With handle 905×494×1080
Frequency	50HZ

Structure:

Remark in Diagram 2
1. Fuel injection body
2. 108 bearing
3. 8210 bearing
4. Shaft
5. Plunger and barrel assembly
6. Return spring
7. 103 bearing
8. Fuel injection pump cam box
9. φ10 washer
10. φ18 washer
11. Oil distributor valve seat
12. O ring
13. φ22 washer
14. Plug
15. Oil screen
  〉〉〉Control valve structure diagram

 Remark:
1. Nut
2. φ17 washer
3. Pressure indicator joint
4. φ13.6 washer
5. Oil nozzle
6. Non-return valve spring
7. φ6 steel ball
8. φ13.8 washer
9. Valve seat
10. Casting
11. Hand sheet
12. O ring
13. Valve seat
14. Restrictor valve stem
15. O ring
16. Puncher
17. φ17.8 washer
18. Pressure indicator
19. Safety valve stem
20. Safety valve spring
21. Safety valve seat
22. Lock nut
23. Safe valve rod
24. Safety valve cap
25. O ring
26. φ32 ring
27. φ13.5 washer
28. Oil return nozzle
29. Valve port
30. φ10 washer
31. Discharge valve stem

This pump belongs to self-priming plunger type. Motor drives shaft 4, through the shaft swash plate pressing the plunger into barrel, and return spring 6 make the plunger raise & plunger reciprocate to achieve suction and discharge oil.
The pump is composed by left & right valves with the same structure. However each valve consists of Restrictor valve (A), Discharge valve (B), Non-return valve (C),Pressure indicator (D),Safety valve (E)，Inlet nozzle, Oil return nozzle and Output nozzle. Please refer Diagram 3.
Restrictor valve----- adjustable conical valve used for adjusting oil supply
Discharge valve-----adjustable conical valve, open-discharge, close-oil supply..
Non-return valve----spherical non-return valve used for ensuring system pressure.
Safety valve---------adjustable excess flow used for adjusting system pressure, It will be adjusted to 50MPa before delivery.

〉〉〉Usage & Maintenance
1. It adopts mineral oil with good quality, summer HJ32 and winter HJ15. Oil should be filtered regularly and replaced by every six months. Note: oil should be 150-200mm in tank when injecting. In order to ensure lubrication, the oil should be not less than 120mm and temperature not exceed 60℃ during operation.
2. Initial operation
It should open control valve to start pump idle running in order to remove air until no bubbles in oil return plastic pipe.
3. Safety valve adjustment
Close Output nozzle-open Restrictor valve-close Discharge valve-start Pump motor-close, Restrictor valve-adjust Safety valve-watch Pressure indicator. Generally adjust Safety valve pressure to be higher than 10%-15% of the working pressure.
4. Control valve operation

5. Pressure indicator calibration
To ensure quality and test accuracy should be check Pressure indicator as per restriction.
6. Trouble-shooting method
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Troublle	Principle	Method
No oil, Oil not enough, Pressure not enough, Pressure fluctuation	1.Air in pump	Start pump, idle running, twist every handle to remove air
	2.High pressure iron pipe leakage	Change to copper washer & wire assembly fix nut
	3.Oil too low	fill oil to height of 150-200mm
	4.Oil too stick or dirty	Change oil, re-filter, change thin oil
	5.Clogging of oil screen	Clean
	6.Valve out of control	Bedding-in valve or change valve
	7.Plunger &barrel worn out	Change
	8.Safety valve out of control	Adjust safety valve, if damage valve pod and valve port
	9.Discharge valve, Restrictor valve  loose or out of control	Bending-in valve port or change valve pod and valve port
Pressure indicator needle back down during loading	1.Leak	Checkout and reinstall
	2.Non-return valve out of control	Bedding-in valve port ot change non-return valve
	3.Discharge valve out of control	Bedding-in valve port or change valve pod and valve port

7. Attention
1) When power connecting, wires should be connected by professional electrician. And zero line must be connected. The workers should check the insulation to avoid electic shock.
2) Pump pipes and components could not be disassembled when there is pressure in pump.
3) It should idle turn to exhaust air until none before using for the pump which need to change oil and no usage for longtime.
4) Oil height should not be less than 120mm to prevent poor lubrication or pump suction air.
5) The directions of motor turning are free, but it’s better to turn clockwise and counter-clockwise interchangeably.