TYM T303HST - Page 236

Part names and
inspection items
Nominal
dimensions
Standard value
for reassembly
Usable limits Service instructions
and remarks
6) SLOW RETURN CHECK VALVE(Flow control valve)
Maximum pressure
280 ㎏f/㎠
Gear oil
SAE #80 ∼ #90
at a temperature of 50
± 5℃
Cylinder port leaks
1 ㏄/min.at a pressure of 90 ㎏f/㎠
7) MAIN CONTROL VALVE
Cylinder port leaks
5 ㏄/min or less under a pressure of 100 ㎏f/㎠
Gear oil
SAE #80 ∼ #90 at a
temperature of 50 ±
5℃
Clearance between
main spool and
casing
0.01 ㎜
8) MAIN RELIEF VALVE
T303HST/T353HST
160+5 ㎏f/㎠
11-6
9) MAIN GEAR PUMP
T303HST/T353HST
21.5 ℓ/min Efficiency of 92 % at
2600 rpm
10) SUCTION FILTER
Rated flow 35 ℓ/min
Filtration density 150 mesh
Filtration area
450㎠
11) LINE FILTER
Rated flow 35 ℓ/min
Filtration density 80 mesh