Jacobsen SLF 1880, Technical/Repair Manual

Page: 153 / 236

8G-51
FRONT TRACTION MOTOR FLOW
TEST
Right Front Traction Motor Flow Test
18.Install wheel restraints on both front wheels
(Figure 8A-2).
19.Remove blocking disc inserted between flow
meter hoses and “T” fittings on hydraulic lines
located behind front axle and reconnect flow
meter hydraulic lines to “T” fittings. (Figure 8G-5).
20.Install blocking disc at the locations indicated in
(Figure 8G-7) to test the right front traction motor.
Figure 8G-7. Right Front Traction Motor Flow Test.
21.Open flow meter load valve, set parking brake,
reel switch off, start engine and advance throttle to
high idle position.
22.Slowly close tester load valve until 2200 psi (152
Bar) is obtained.
23.Read/record gpm (lpm) flow on Traction Circuit
Test Record (Figure 8G-13).
• If flow drops 0.5 gpm (1.9 lpm) or less, right
front traction motor is okay, proceed to Left
Front Traction Motor Test.
• If flow drops 0.5 to 1.5 gpm (1.9 to 5.6 lpm), the
right front traction motor is marginal.
• If flow drops more than 2 gpm (7.6 lpm), perfor-
mance will be noticeably reduced. The right
NOTICE
Before performing this test, a traction pump flow test
must be performed. Flow meter connections are
maintained from traction pump flow test with the
exception of the blocking disc being relocated. The
flow lock tool should remain in place and adjustment
retained.
In
Out
Blocking
Disc
Right Front Traction Motor Flow Test
Top Hydro Port
“Reverse”
Bottom Hydro Port
“Forward”
Top Hydraulic Line
“Reverse”
Bottom Hydraulic Line
“Forward”