Daily

• Check the Iso lube reservoir. Replace the lube oil if it changes color or shows signs of solidifying — wipe the inside of the reservoir clean while you’re in there.
• Look for a light film of Poly (R) material on the pump shaft and wipe it away so dirt doesn’t accumulate and damage the shaft packings.

Bi-Weekly (or Daily if drums are opened before install)

• Inspect and clean the Iso and Poly inlet material screens before startup, not after — the unit should be purged immediately following any screen cleaning. Replace a screen once more than about 20% of its surface is blocked.

Yearly

• Service the hydraulic drive system: drain the tank, clean it out, inspect the suction pipe, and refill with 10 gal of approved ISO 32 hydraulic oil.
• Rebuild the “A” and “R” proportioning pumps while the machine is already out of service for the hydraulic drive work — this is the kit most PH-25 rebuilds actually need (KT-07000 / KT-07001 above).

As Needed

• Heater not heating and controller shows ambient temp: check the heater breaker first, then the solid-state relay LED, before assuming a fire rod is bad.
• Pumps won’t reverse direction: check the reversing plate and proximity switches before replacing the directional valve — a bent plate or dirty switch face is the more common cause.
• One pressure gauge reads low and won’t hold: this is almost always an inlet or discharge ball not seating properly on that side — clean or replace the ball/seat rather than assuming a bigger part has failed.

Full step-by-step procedures are in PMC’s official PH(X)-25/PH(X)-40 Service Manual (MN-04014) — we’re happy to walk through any of these over the phone.