01
2025
-
04
Oil is Too Thick or Too Thin
Oil is Too Thick or Too Thin
Thick oil may cause:
Difficult start-up
Stiff operation
Danger of cavitation in the pumps
Accelerated wear of pumps and breaker
Sticky valves
Filter bypasses (oil impurities not removed), contamination in hydraulic tank
Thin oil may cause:
Efficiency losses (internal leakage)
Breaker strikes slowly and irregularly
Damage to gaskets and seals, leaks
Accelerated wear of parts from decreased lubrication
Hydraulic Oil Purity
It is beneficial for the tank return line to pass through a filter. This ensures dirt introduced into the system
by connecting and disconnecting the breaker is caught before entering the carrier’s pump. Dirt destroys a
hydraulic system, so ensure the breaker hose connections are protected when the breaker is not in use.
Impurities also heat and age the hydraulic oil.
Air and water are also considered impurities in oil (not all impurities can be seen with the naked eye).
Impurities can enter the hydraulic system:
When components are repaired or serviced
During hydraulic oil changes and refilling
When the breaker is operated with worn cylinder and seals
When hoses are disconnected during breaker removal/installation
ROCKAGE HYDRAULIC BREAKER USER MANUAL
6Results of damage by hydraulic oil impurity:
Working life of pump(s) significantly shortened – rapid wear of parts, corrosion.
Valves do not function properly – spools bind, accelerated wear of parts, blocking of small holes.
Rapidly accelerated wear on cylinders and seals.
Reduced breaker efficiency – accelerated wear of moving parts and seals, piston seizing up, oil
leakage.
Shortened working life and reduced efficiency of hydraulic oil – overheats, ages, electrochemical
changes.
Excessive large particle contamination can cause severe damage to the piston and piston cavity.
▲CAUTION!
After a major component failure, the hydraulic system must be flushed.
Component damage is only a symptom. The trouble itself cannot be cured by removing the symptom.
Hydraulic Oil Cooling
▲CAUTION
The maximum permitted hydraulic oil temperature in continuous breaker use is 120°-158°F(50°-70°C),
depending on the viscosity of the oil in the system.
It is essential the carrier has a reliable hydraulic oil temperature sensor installed. The temperature of the
hydraulic oil will depend upon ambient conditions, efficiency of the cooling system, and the amount of
breaker use.
Additional cooling may be required.
Related News
2025-04-01
2025-04-01
CONTACT US
Wendy (She/Her)
WhatsApp/Wechat/Cell: 86 18953507022
Yantai Rocka Machinery Co., Ltd
Address: No.26 Taoyuan Rd, Dongting Industrial Park, Fushan District,
Yantai, Shandong, China 265500
www.rockahammer.com
ROCKA MACHINERY