JD 1020 hydraulic pump torque values.

[rslwv]

I am in the process of putting my hydraulic pump back together. The manual gives very specific values for the piston plugs, (100 ft-lbs), and the cover cap screws (36 ft-lbs), but says just "tighten securely" for the inlet valve guides and the outlet valve plugs. Any help would be appreciated. Thanks in advance.

 

[Tx Jim]

Tech manual I have for 2040 states utilize chart for torques for hardware near front of manual for any torques #s not listed in pump torque listing

 

[Outinstickssnafu]

Somewhere I have a book on JD hydraulic pumps, it's been many years since I laid eyes on it. I'll have a quick look for it tomorrow.

 

[rslwv]

Tech manual I have for 2040 states utilize chart for torques for hardware near front of manual for any torques #s not listed in pump torque

OK, thank you. The general torque numbers look pretty high for hollow plugs that's why I was asking.

 

[rslwv]

Somewhere I have a book on JD hydraulic pumps, it's been many years since I laid eyes on it. I'll have a quick look for it tomorrow.

Thank you.

 

[rslwv]

Just did what I should have done yesterday. Called the local dealer's service department. They told me these old tractors usually only had torque specs on things that held parts together that would leak or structural. I was told to just tighten the valve seats and caps until they seated good. Hope this helps others in the future.

 

[Outinstickssnafu]

Ok I presume a 1000 series pump. I also used to have somewhere what I presume was a comprehensive reference to the various JD pump types, numbering and how to identify what pump was which, for those "just in case" instances. I can't even recall if it was paper or digital atm. Sorry.

Hmmm what the dealers tell suckers potential clients. Some are very helpful, at other times staff have been told to keep their mouths shut or else. (I watched the whole TA shaft industry blossom in older IH gear (60 early 70s vintage,) because IH dealers made a good bit of $$$ from the "official" oil they sold for transmissions, and didn't tell their customers any better, apart from recommending people use their oil.)




I did find CTM-7

Pardon the dots which makes it look like a hot mess, I couldn't locate the table maker I use from time to time.

HYDRAULIC PUMP SPECIFICATIONS-1000 SERIES PUMP

Item ................................... Measurement .................................... Specification

Pump Shaft Standard Drive ............ End Play .................................... 0.152-0.941 mm
...........................................................................................(0.006-0.037 in.)
Through Drive ......................... End Play ......................................0.0254-0.0762 mm)
............................................................................................(0.001-0.003 in.)
Piston .................................... OD .........................................17.259-17.269 mm
..........................................................................................(0.6795-0.6799 in.)
Piston Bore .............................. ID ........................................ 17.277-17.292 mm
..........................................................................................(0.6802-0.6808 in.)
Shaft Journal ............................. OD ....................................... 37.770-37.783 mm
..........................................................................................(1.4870-1.4875 in.)
Shaft Bearing Race .........................ID ........................................ 45.730-45.746 mm
..........................................................................................(1.8004-1.8010 in.)
Shaft Bearing Race ........................ OD .........................................56.77-57.03 mm
............................................................................................(2.235-2.245 in.)
Shaft Needle Rollers ...................... OD ............................................3.962-3.967 mm
...........................................................................................(0.1560-0.1562 in.)
Thrust Washer (Standard Drive) ..... Thickness (new) ....................................2.21-2.31 mm
............................................................................................(0.087-0.091 in.)
Thrust Washer (Through Drive) ....... Thickness (new) ....................................3.13-3.23 mm
............................................................................................(0.123-0.127 in.)
Piston Spring ....................... Free Length ................................ 48 mm (1.9 in.) (approx.)
.........................................Test Length .................................. 32 mm at 80-100 N
..........................................................................................(1.3 in. at 18-22 Ib force)
Discharge Valve Spring ..................Free Length .................................. 12.2 mm (0.5 in.) (approx.)
..........................................Test Length .................................... 7.6 mm at 11-14 N
..........................................................................................(0.3 in. at 2.5-3 Ib force)
Inlet Valve Spring .................... Free Length ....................................13 mm (0.5 in.) (approx.)
......................................... Test Length ................................... 8 mm at 1.4-1.8 N
........................................................................................(0.3 in. at 0.3-0.4 Ib force)
Pressure Compensator Valve Spring ...... Free Length .................................. 71 mm (2.8 in.) (approx.)
......................................... Test Length .................................... 63.3 mm at 701-857 N
.......................................................................................(2.5 in. at 158-193 Ib force)
Crankcase Outlet Valve ................. Free Length ...................................63.5 mm (2.5 in.) (approx.)
..........................................Test Length ....................................52.5 mm at 196-240 N
............................................................................................(2.1 in at 44-54 Ib force)
Piston Plug ............................. Torque ............................................. 122 N·m
......................................................................................................(90 Ib-ft)
Inlet Valve Seats ........................ Torque ..............................................68 N·m
......................................................................................................(50 Ib-ft)
Cover-to-Pump Housing .................... Torque ..............................................47 N·m
......................................................................................................(35 Ib-ft)

Litho in U.S.A. 05·2 CTM-7 (5-89)

2000 series is different and varied and for

Inlet Valve Plug ............................. Torque ............................................. 136 N'm
......................................................................................................(100 Ib ft)
Piston Plug (Internal Hex) ................... Torque ..............................................136 N'm
......................................................................................................(100 Ib ft)
Piston Plug ................................... Torque ..............................................185 N'm
......................................................................................................(135 Ib-ft)

10-4

 

[rslwv]

Thank you.

 

[rScotty]

Just did what I should have done yesterday. Called the local dealer's service department. They told me these old tractors usually only had torque specs on things that held parts together that would leak or structural. I was told to just tighten the valve seats and caps until they seated good. Hope this helps others in the future.

Doesn't that just frost you? Here you have a question that would stump half the seasoned mechanics on this forum, and some kid in the service dept gives a total BS "explanation" off the top of his head because he actually doesn't have the slightest idea.

Dunning & Kruger were right.