HATCHEQUIP
Senior Member
----"Amen brother, preachen to the choir".
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Weird Hydraulic Issue cat 315CL
- Thread starter floridamechanic
- Start date
-
- Tags
- hydraulic help
I tried to read newer manual for Rexroth A8V pump once: it was like that thing was first translated from German to Swahili, then from Swahili to Maori, and then from Maori to English ( or even had some more languages in between). But then I found older publication - and everything became clearer than a day light!----"Amen brother, preachen to the choir".
HATCHEQUIP
Senior Member
How about putting some large magnets inside tank, have had good results doing this over the years to catch that last bit of metal and maybe anything in the future.
funwithfuel
Senior Member
Most return filter have magnet stacks in center of filter to catch wayward junk.
funwithfuel
Senior Member
Well, I did say most
JPV
Senior Member
I don't think that has any magnets in the return filter, I have never seen any magnets on any of our Cat excavators older or newer than that. It is a great idea, could put them right on top of the suction strainer, would be easy to keep an eye on there. I think I might try it myself on one of ours, a couple cow magnets would be perfect!
HATCHEQUIP
Senior Member
I tried to read newer manual for Rexroth A8V pump once: it was like that thing was first translated from German to Swahili, then from Swahili to Maori, and then from Maori to English ( or even had some more languages in between). But then I found older publication - and everything became clearer than a day light!
-----Reminds me of when komatsu 1st started coming to the US and their manuals
-----Reminds me of when komatsu 1st started coming to the US and their manuals
Have to remember that the relief valve that OP cleaned lives right downstream from pumps discharge, the only thing between is MCV center passage. No filters or anything in between. So whatever pumps spits out - reliefs gets it.
HATCHEQUIP
Senior Member
floridamechanic
Well-Known Member
I used the same magnets that use for wide load signs on lowboy, put them in tank in several locations,
floridamechanic
Well-Known Member
Drained and filled with new oil and new filters and cleaned screen, real light brass just a little bit, no other metal, will cut filters tomorrow, both pumps hold 5k, pumps in neutral guess call it standby pressure is 1100,pulled relief valve blew out passage and checked was clean clean, screwed smaller screw out up to 3 turns no drop in NC pressure, will pull acuator off old pump tomorrow and learn how to re-shim then pull this one off,
Last edited:
John C.
Senior Member
You are supposed to turn the pump adjusters in to lessen NC pressure. I believe adding shims with increase NC pressure.
Aside from all that, how is the machine working? Brass won't get caught by a magnet.
Aside from all that, how is the machine working? Brass won't get caught by a magnet.
floridamechanic
Well-Known Member
yes I know magnet will not pick up brass, one of those just in case deals, will try turn screws in tomorrow when get in, mobiltech post on page 20 says remove shims lower pressure, only 4 bolts hold actuator on so easy to remove, machine good and strong just has the pump chirp on boom and stick functions
John C.
Senior Member
I know you know. It was just a reminder to others that the failure was brass slipper feet and not a total catastrophe with shrapnel throughout the system. I just suggested the screw because it was easy and quick and could go back to original position with little trouble. Good Luck Tomorrow!
View attachment 192849 Testing and Adjusting
315C Excavator Hydraulic System
Media Number -RENR5519-08 Publication Date -01/06/
i01463605
Pump Control (Negative Flow) - Adjust
SMCS - 3222-025-FW
View Image
Illustration 1 g00764907
Pump regulator (right pump)
(1) Bolt
(2) Cover
(3) Seal
(4) Spring seat
(5) Spring
(6) Shim
Perform the following steps in order to adjust the right pump.
Adjust the left pump in the same manner as the right pump.
- Remove two bolts (1).
- Remove cover (2) and seal (3).
- Remove spring seat (4) and spring (5).
- Add shims (6) in order to increase the negative flow. Remove shims (6) in order to decrease the negative flow. Refer to Table 1 for available shims and shim thickness.
Note: A change of 0.1 mm (0.0039 inch)in shim thickness will change the negative flow rate 2 L/min (0.5 US gpm)at a negative flow control pressure of2350 kPa (340 psi).
Table 1
Available Shims
Part Number Shim Thickness
099-3669 Shim 1.00 mm (0.0394 inch)
099-6109 Shim 1.05 mm (0.0413 inch)
099-6110 Shim 1.10 mm (0.0433 inch)
099-6111 Shim 1.15 mm (0.0453 inch)
099-6112 Shim 1.20 mm (0.0472 inch)
099-6113 Shim 1.25 mm (0.0492 inch)
099-6115 Shim 1.30 mm (0.0512 inch)
099-6117 Shim 1.35 mm (0.0531 inch)
099-6118 Shim 1.40 mm (0.0551 inch)
099-6119 Shim 1.45 mm (0.0571 inch)
099-6120 Shim 1.50 mm (0.0591 inch)
099-6121 Shim 1.55 mm (0.0610 inch)
099-6122 Shim 1.60 mm (0.0630 inch)
099-6123 Shim 1.65 mm (0.0650 inch)
099-6124 Shim 1.70 mm (0.0669 inch)
099-6125 Shim 1.75 mm (0.0689 inch)
099-6126 Shim 1.80 mm (0.0709 inch)
099-6127 Shim 1.85 mm (0.0728 inch)
099-6128 Shim 1.90 mm (0.0748 inch)
099-3670 Shim 1.95 mm (0.0768 inch)
- Install shims (6) in the pump regulator.
- Install spring (5). Install spring seat (4).
- Install cover (2) and seal (3).
Note: Inspect seal (3). If the seal is damaged, replace the damaged seal with a new seal.
- Install bolts (1). Tighten bolts (1) to a torque of 95 ± 15 N·m (70 ± 11 lb ft).
Is there somewhere it’s says what that flow or pressure supposed to be?