1967 4020 Main Hydraulic Pump

2510Paul

Well-known Member
I am likely going to need a main Hydraulic Pump (under radiator) for a 1967 Serial #148xxx 4020 Synchro. I see many people out there offering pumps. Does anyone have particularly good experience with anyone in particular? Of course my main concern is price and getting a good pump. Paul
 
What is wrong with your pump? Unless the housing is damaged those pumps are relativly easy and economical to overhaul.
 
The pump is making a loud Whirr noise, the discharge line has a strong vibration in it.

My son says the same, "just take it apart". He is across the country right now so he cannot help me. I have replaced the main shaft and bearings in one before. I have never taken apart the stroke control valve and outlet valve. I am concerned about getting them adjusted right. JDH-19 looks like the tool I need for the outlet valve and the stroke control valve may be just setting the pressure. Any comments about adjusting those two valves? Yes, the rest of it looks reasonably straight forward. Thanks for your comments. Paul
 
Again, thanks for your response. See the page attached. The valve on the left I believe is the stroke control valve and it is adjusted based on the pressure the pump develops as you said. The valve on the right is my concern, from this page I understand it needs adjustment as well. What can you tell me to adjust this valve. I am thinking I will go to the dealership and see if I can borrow JDH-19. What have you done to adjust this valve in the past? Paul
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