Jack hammer truble shooting

all these types of jack hammers hammers use 40 w oil
its electric
cant find a user manual for it online

if no visible site glass or oil filler
whats the chances you have to undo part of the jack hammer
at the Allen key bolts

reviews say these arksen units leak oil often

use a gun to shoot the truble

A-90582 2 tubes of grease 30cc http://www.acetoolonline.com/Makita-Tools-A-90582-Hammer-Grease-30Cc-p/mak-a-90582.htm

Have you checked the oil?

Replace the "O" ring seals.

Grease bosch order nr 1 615 430 001 225 ml for 1 service OR 1 615 430 007 1000 ml for bulk repair.

first drain oil from pan to prevent making mess ion floor.
Then remove all oil pan screws and pry pan off making sure it does not get bent.
If bent lightly tap with hammer on flat surface like workbench.
Some models are designed so that getting at all the screws is impossible. In that case you might have to remove engine mounts at the engine block and lift with a floor jack.
safest jack is a transmission jack.
the engine should be tied off with some heavy wire to prevent falling on you with a 4x4 or wood fence post.
Remove the metal baffle, should be only one screw.
Baffle is metal rectangular piece and in the middle.
The oil pump uses 2 screws and might have to tap lightly with hammer to remove.
Clean out the oil passage where the pump came off with a rag and thin screwdriver.
Clean baffle with some solvent and make sure it reseals properly when reassembling.
Remember to clean all parts to prevent leakage when reassembling.

Makita recommends using their brand of Makita Hammer Grease if you are doing the lubrication yourself.
You did not indicate a model number but all of their hammers have simliar instructions, 2 oz of grease, do not overfill which can cause faulty hammering or tool failure.

Brute hammer uses special grease sold as service kit. This kit contains enough grease to lube hammer and replacement bolts that hold springs along the bottom. Check www.toolpartsdirect.com for parts and kit. Remove the lower half (tube) of hammer, also remove three bolts that hold springs and remove assembly from tube. Wash out old grease. Grease will be oil-like only when hammer is very hot, otherwise grease is paste-like. Good luck.

you will require to get the car to a dealer to but on the diagnostic equipment to determine what your problem is but you can check a few things like when the car is idling open the oil filler cap and check what he engine is doing the engine should not stall this will give you an indication that the pcv valve is leaking and must be changed.