Sakai R2-4, Shop Manual

Page: 70 / 234

4-010
HYDRAULIC SYSTEMS
2-2-2. Propulsion hydraulic motor (F,L) (F,R)
R2H-2-04002
1 2
12
13
11
6
5
8 7
4
3
10 9
1
5
6
2
3,8
9 4 7
Motor circuit diagram
(1) Port B1 : G3/4 (8) Parking brake pilot port [MLP] : G1/4
(2) Port A1 [ML1] [MR1] : G3/4 (9) Speed change port [MLS] [MRS] : 9/16-18UNF
(3) Parking brake pilot port [MRP] : G1/4 (10) Shift valve assembly
(4) Drain port [MLD] : G1/2 (11) Motor
(5) Port B2 [MLB] [MRB] : G1/2 (12) Reduction gear
(6) Port A2 [ML2] [MR2] : G1/2 (13) Plug : PF 3/8
(7) Drain port [MRD] : G1/2
Motor specifications
Displacement (max.) • : 55.1 cm
3
/rev ( 3.36 cu.in./rev )
(min.) : 28.5 cm
3
/rev ( 1.74 cu.in./rev )
Brake release pressure • : 1.3 to 1.7 MPa ( 189 to 247 psi )
Allowable motor case pressure • : 0.3 MPa ( 44 psi ) or less
Reduction gear specifications
Reduction ratio • : 1:32.11
Weight • : 162 kg ( 357 lbs. )