How to check DSY electric pressure test pump

1. Check DSY electric pressure test pump plunger sleeve

(1) Check DSY-type electric pressure test plunger pump hole in the scratch. The plunger sleeve is available if the DSY electric pressure test pump has been tested for tightness on the ST-990 or 3375375 tester. If the amount of leakage is large, you must replace the plunger and plunger sleeve.

(2) Use a high magnification magnifying glass to check the burr, coke and deformation in the measuring hole. When the metering hole is damaged, DSY-type electric pressure test pump that does not work. Do not attempt to clean with wire, plug gauge, etc., should be cleaned with solvent.

(3) check the fuel tank stuffy plug loosening and plunger sleeve with or without cracks.

(4) in the black zone check DSY electric pressure test pump plunger sleeve surface damage and flatness how. Some electric pressure test pump plunger sleeve nozzle tip has been canceled.

① Wash and dry the entire oil film on the plunger sleeve thoroughly before turning it on.

② Use flat (preferably grinding plate) and "bluing agent" check the flatness of the plane.

③ If you find damage or uneven grinding should be carried out repair. The abrasive used was A280.

④ Do not use emery cloth or wire brush on the contact surface of plunger sleeve and nozzle tip.

(5) If the 5/16 DSY electric pressure test pump is overheated, the gasket between the plunger sleeve and the motor pressure test pump may melt. Nozzle head cap will be loose, therefore, may have the following questions:

① lubricant dilution or DSY electric pressure test pump nozzle plugging.

②DSY electric pressure test pump sleeve or plunger damage.

(6) high-capacity plunger sleeve into the oil and return hole compared to the standard plunger sleeve hole about high 1.27-1.65mm, in the same engine can not be mixed with the standard electric pressure test pump and large-capacity electric test Pressure pump.

How to check DSY electric pressure test pump

2. Check DSY electric pressure test plunger plunger

If plunger plunger wear is too large should be replaced.

3. Check DSY electric pressure test pump plunger and take over

(1) carefully check for metal scratches. This is usually the only sure sign of blocking or getting stuck.

(2) The bright spots or scratches on the top of the working surface of the plunger, on the opposite bottom, and in the middle are generally the normal results of rocker side thrust. The plunger can continue to be used without metal flaking or measurable wear at these locations. If the wear is excessive, return the plunger sleeve and plunger to the Cummins repair shop for a new plunger.

(3) The small streaks on the length of the plunger are usually the result of varying thicknesses of the anti-corrosive permeation treatment layers. If there is no obvious surface abrasion, ease of use.

(4) Check the plunger and take over the pressure at the crack and loosening situation. Can you turn your hand?

(5) Excessive wear or damage may be found on the spring contact surface of the plunger take-up flange.

(6) Check the plunger ball socket wear or crack.

Caution: Care should be taken in handling to prevent bumps in the pressure test plunger, which can be scrapped as soon as the plunger is damaged.

(7) Check the coke on the small outer diameter near the cone end of the plunger.

(8) top limit DSY-type electric pressure test plunger plug can generally be replaced by a chromium-plated plunger pressure test pump to be resolved.

(9) The identification mark of the large-capacity plunger is that the plunger has a wide oil return groove (6.73mm).

Note: High-capacity plungers can be used in high-capacity plunger sleeves as well as in standard plunger sleeves.

4. Check the check ball valve and seat

(1) Check the seat on the nicks and burrs.

① Do not trim the check ball seat by releasing the steel ball. The hardness of the plunger sleeve is the same as a steel ball, which can damage the ball.

② If the ball seat is damaged, replace the plunger sleeve and the plunger.

(2) Balls should be replaced if any damage or damage is found on the steel balls.

(3) check the check ball seat depth. When the ball is released, the height of the ball must not exceed the surface of the sleeve.

5. Check DSY electric pressure test pump body

(1) Check the amount of burrs on the hole or other issues.

(2) check into the oil passage, to ensure smooth.

(3) Check the nozzle head cap thread is damaged.

(4) Inspect nicks or burrs on the o-ring mounting surface that could damage the o-ring during installation.

(5) Check nicks and burrs on mating surface of plunger sleeve. If found to be damaged, should be ground repair.

(6) Check the inner diameter of the hole behind the adjustable amount of plug. If the used oil hole reamer is too long, the needle may pass through the DSY electric pressure test pump body, with the result that the lubricant is diluted.