Maintenance Activities; Hydraulic Oil - Holmatro HTS 550 A Manual

EN
8.4

Maintenance activities

8.4.1 General
• Check the operation of the pump
• Check the pump for damage and leaks. If the pump does not work properly and/or leaks, have it
repaired by a Holmatro certified technician.
8.4.2 Hydraulic coupler
• Check the couplers for damage. Have a Holmatro Certified Technician replace damaged couplers.
• Clean the coupler with luke warm water and a mild soap solution.
• Dry the couplers.
• Quick-lock couplers:
- Lubricate the end of the coupler with hydraulic oil or inject WD-40.
- Lubricate the locking ring by injecting WD-40 into the space between the back section and the
locking ring.
- Lubricate the retainer ring by injecting WD-40 underneath the ring.
- Connect the couplers and check whether the coupler locks automatically. Check the locking by
pulling the hoses apart with a normal manual effort. The couplers must not slip.
- Disconnect the couplers by turning the retainer ring and pushing the locking ring backwards.
• High-Flow couplers:
- Lubricate the end of the coupler with hydraulic oil or inject WD-40.
- Lubricate the retainer ring by injecting WD-40 underneath the ring.
- Check the locking by pulling the hoses apart with a normal manual effort. The couplers must not
slip.
- Disconnect the couplers by turning the retainer ring.
• Connect and disconnect the couplers a few times to improve the internal lubrication of the locking
system.
8.4.3 Dust caps
• Check the dust caps for damage. Replace damaged dust caps.
• Clean the dust caps with running water. Dry the dust cap and treat it with preservative oil.
8.4.4 Hydraulic hoses
• Clean the hose with luke warm water and a mild soap solution.
• Check the hose for damage and leaks. Replace the hose if it leaks, has kinks, the reinforced cover
is visible or it has blisters or bulges higher than 1 mm. In case of doubt always contact the Holmatro
dealer who can assess the seriousness of the damage.
• Replace the hose no later than 10 years after the date of manufacture, regardless of its use and
external appearance. The date of manufacture is part of the test code, the first 4 digits of the test
code specify the date of manufacture of the hose (yymm*****).
8.4.5

Hydraulic oil

Check the hydraulic oil and refill if necessary:
• Set the pressure relief valve in the "neutral" position.
• Place the pump vertically with the dipstick opening upwards.
• Refill with hydraulic oil to the maximum level.
36 916.000.901_000 HTS/HTW/FTW