SUNWARD SWDM40 - Hydraulic Hoses Replacement; Cleanness Control for Hydraulic System; Hydraulic Oil Temperature Control

SWDM40 OPERATION & MAINTENANCE MANUAL
210
8.10.7 Hydraulic Hoses Replacement
Even if hoses are not damaged, it still need to be changed after worked for maximum 6 years, of
which including maximum 2 years storage.
Note for changing hydraulic hoses:
 On the basis of date of production marked on the hoses to calculate working
hours and storage time.
 When dismantling pipe joint, new sleeve and pipe joint should be replaced.
 Before installation, components in the hydraulic pipeline should be cleaned
first.
 Pay attention to protect hose end to avoid impurity.
8.10.8 Cleanness Control for Hydraulic System
Note！
 If oil is dirty, the hydraulic components will be abraded quicker, resulting in
the valve spool stuck and clogged resistance hole.
 The cleanness of hydraulic oil should be under level NAS9.
Following points should be observed to keep the hydraulic system oil clean.
 Clean hydraulic oil tank before filling oil.
 Clean the surrounding of oil filler and fill oil with fine filter. Install the oil cap
at time and keep the oil tank is sealed.
 After initial 500 hours of operation, clean or change filter element and filter
hydraulic oil. After that clean or change filter element and hydraulic oil every
500 to 1000 hours of operation. If the drilling machine has been stored for over
than one year, the hydraulic oil should be changed or filtered.
 If the drilling machine is stopped for a long time, air with water will enter into
the oil tank via air filter, and bring water into hydraulic oil, emulsifying oil and
denaturing it, thus, it will take a while to heat up oil eliminating water and then
operate the machine.
8.10.9 Hydraulic Oil Temperature Control
Hydraulic oil should be not over than 80
℃
normally, no more than 90
℃
at most during
operation.
 If oil is too hot, the service life of hydraulic components will be shortened by
more abrasion, increasing inner leakage caused by less oil viscosity and worse
lubrication. Besides, the aging of seal parts will be accelerated and oil quality
will be easier to go bad.