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Checking & Bleeding Hydraulic Oil
Hydraulic oil may need to be added periodically
to the ram after prolonged use or if it leaks. We
recommend ISO 32 or 46 grade hydraulic oil.
Sometimes air can get trapped in the hydraulic
chamber while adding oil, keeping it from function-
ing properly. This can be corrected by bleeding
the hydraulic oil.
To check and add hydraulic oil:
1.
Loosen hydraulic release valve and wait for
lower die to fully lower (see Figure 11).
Figure 11. Location of hydraulic release valve.
2.
Remove oil plug (see Figure 12).
Figure 12. Location of oil plug.
3.
Check hydraulic oil level by inserting hex
wrench.
-4-
Release Valve
Oil Plug
— If oil level is visible in fill reservoir, do
not add oil. Replace plug and proceed to
Step 5.
— If oil level is not visible in fill reservoir, pro-
ceed to Step 4.
4.
Add hydraulic oil to fill reservoir until level
reaches the plug hole then re-install oil plug.
5.
Tighten hydraulic release valve and pump
brake handle 3–5 times to test that hydraulics
function properly.
— If hydraulics do not raise ram, bleed
hydraulic system before returning to nor-
mal operation.
To bleed hydraulic oil:
1.
Remove oil plug (see Figure 12).
2.
Pump brake handle until lower die reaches
highest position.
3.
Loosen hydraulic release valve and wait for
lower die to fully lower (see Figure 11).
4.
Repeat Steps 2–3 at least three times to
force hydraulic oil through system.
5.
Check hydraulic oil level.
— If oil level is visible in fill reservoir, there
is no need to add oil. Install plug and pro-
ceed to Step 7.
— If oil level is not visible in fill reservoir, pro-
ceed to Step 6.
6.
Add oil to fill reservoir until level reaches bot-
tom of plug hole then re-install oil plug.
7.
Tighten hydraulic release valve and pump
brake handle 3–5 times to test that hydraulics
function properly.
Model T28930 (Mfd. Since 12/18)
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