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When you are not using the implement relief valve, use the charge relief valve. The charge relief that was in use is not plugged up. The charge relief valve when repairing, take out the plug, then put in the spring and poppet out of the housing. Try not to mess with the shims or try to make other parts work in valve. Look over the poppet and where it sits in the housing for any kind of wear and tear or mark, scuffs and take out any debris in the valve space. If you need to replace worn out parts...

HEAVY EQUIPMENT AND EXCAVATOR HYDROSTATIC DRIVE PUMPS AND MOTORS REPAIR PROGRAM KAJ3905 Link-Belt 1600Q Hydrostatic Main Pump Parts w/o Blade KNJ1817 Link-Belt 2650Q Hydrostatic Main Pump Parts KLJ0317 Link-Belt 2650Q2 & 2700Q1/2 Hydrostatic Main Pump Parts LNM0387 Link-Belt 2800Q Hydrostatic Travel Motor Parts LMN0388 Link-Belt 2800Q/3400Q Hydrostatic Travel Motor Parts (Std) KRJ4573 Link-Belt 2800Q1 Hydrostatic Main Pump Parts KRJ4690 Link-Belt 2800Q1 Hydrostatic Main Pump Parts KBJ2579 Link-Belt 3400Q Hydrostatic Main Pump Parts KSJ2275 Link-Belt 4300Q Hydrostatic Main Pump Parts KSC0182 Link-Belt 4300Q Hydrostatic Swing Motor Parts LNM0457 Link-Belt 4300Q Hydrostatic Travel Motor Parts LPM0165 Link-Belt 5800/6000Q Hydrostatic Swing Motor Parts...

They have made the feedback pin longer on the swashplate assy. Now the pin is .535 inches long from the .340 inches it was. When replacing any new pins going forward on repair jobs, the old one will no longer be available. The slot in the pin needs to face rotating kit or 160 degrees away from it. If yours is an older unit you will need to use a control sleeve.slotted pin………………..old p/n 9004700-2512………new p/n 5000381pin length…………………………………075″………………….9375″model numbers affected…………..All M46-2xxx and M91-46xx If you need further help with this, call us at 800-361-0068sales@htsrepair.com

This is for M46 styles of pumps, single and tandem variable displacement pump manual tells what parts go into that pump or motor. Such parts are cylinder block, valve plate, and housing. If you have older units, the manual is a great help. It may have updated service bulletins that let you when new parts replace older ones. And if you can get those older parts any longer. Like housings of older units, which ones take EDC, HDC or MDC. Some older housings will only take one of the controls. The update housing has a hole C where the ones...

Some changes are the seats, they were peened to the leveler. Now they are adding hardened shims to go in between the swashplate leveler springs and the endcap. They are also have hardened the leveler spring seats and they are detached pieces. Repairing the units will be a bit different. You will have put in the shims into the pockets in the end cap and add grease. And when you put in the lever springs, you will have to make to do the swashplate leveler so the spring sets down in there right. The servo pressure check relief valves are...