Jacobsen LF 550 - LDU Information; Alarm Codes and Displays; Diagnostic Screens; Operator Mode Displays

2-6 4241262-Rev B
SPECIFICATIONS AND GENERAL INFORMATION
2
Hydrostatic Power Train
Test Specification
Traction Pump Flow gpm (lpm) 38.3 (145) at 3150 rpm
Forward System Relief Pressure—
Machine Serial Numbers Ending 1651 Through 2499
psi (bar) 3625 ± 10% (250 ± 10%) at 3150 rpm
Forward System Relief Pressure—
Machine Serial Numbers Ending 2500 and Up
psi (bar) 4350 ± 10% (300 ± 10%) at 3150 rpm
Reverse System Relief Pressure
psi (bar) 3625 ± 10% (250 ± 10%) at 3150 rpm
Charge Pressure
psi (bar) 315 ± 10% (22 ± 10%) at 3150 rpm
Hydrostatic Leakage Percentage Ranges 0–10% = Good
11–20% = Marginal
21% and Beyond = Bad
Repair Specification
Drive Shaft Mounting Screw Torque lb-ft (N·m) 35–40 (47–54)
Traction Pump—Test Port Fitting Torque
lb-ft (N·m) 17 (23)
Traction Pump—Return Tube Fitting Torque
lb-ft (N·m) 80 (108)
Traction Pump—Charge Filter Tube Fitting Torque
lb-ft (N·m) 60 (81)
Traction Pump—Ports “A” and “B” Fitting Torque
lb-ft (N·m) 100 (135)
Traction Pump—System Relief Valves Torque
lb-ft (N·m) 130 (176)
Traction Pump—Charge Pressure Relief Screw
Torque
lb-ft (N·m) 80 (108)
Traction Pump—Tow Valve Torque
lb-ft (N·m) 15 (20)
Traction Pump—Front Cover Screw Torque
lb-ft (N·m) 43 (58)
Traction Pump—Cover Plate Screw Torque
lb-ft (N·m) 57 (77)
Traction Pump—Auxiliary Pad Screw Torque
lb-ft (N·m) 32 (43)
Traction Pump—Case Outlet Plug Torque
lb-ft (N·m) 85 (115)
Traction Pump—Plug Torque
lb-ft (N·m) 15 (20)
Traction Pump—Servo Piston Cover Plug Torque
lb-ft (N·m) 27 (37)
Traction Pump—Servo Piston Cover Screw Torque
lb-ft (N·m) 11 (15)
Traction Pump—Seal Nut Torque
lb-ft (N·m) 27 (37)
Traction Pump—EDC Mounting Screw Torque
lb-ft (N·m) 10 (14)
Traction Pump—Filtration Cover Screw Torque
lb-ft (N·m) 22 (30)
Traction Pump—Filtration Cover Plug Torque
lb-ft (N·m) 27 (37)
Brake Release Valve—Coil Nut Torque
lb-in. (N·m) 33–53 (4–6)
Brake Release Valve—Ports “ST” and “BR” Fitting
Torque
lb-ft (N·m) 17 (23)
Brake Release Valve—CHG and DRN Ports Fitting
Torque
lb-ft (N·m) 17 (23)
Brake Release Valve—Direction Control Valve Torque
lb-ft (N·m) 30–35 (40.7–47.5)
Brake Release Valve—Direction Control Valve Nut
Torque
lb-in. (N·m) 40–60 (4.5–6.8)
Brake Release Valve—Coil Nut Torque
lb-in. (N·m) 35–53 (4–6)
Brake Release Valve—Solenoid Valve Torque
lb-ft (N·m) 26–30 (35.3–40.7)
Brake Release Valve—Relief Valve Torque
lb-ft (N·m) 20–25 (27.1–33.9)