Manitowoc Grove CD3340B Service Manual page 205

CD3340B/YB4411
Installation of 75 Micron Strainer
If the transmission has not been thoroughly cleaned during
overhaul, any particles below 200 microns (0.2 mm) can
pass through the existing suction strainer and into the
transmission pump before being caught in the pressure filter.
Contamination can cause scoring of bearings and clutch
housings.
It is recommended that a special 75 micron (0.075 mm)
service suction strainer be temporarily installed after
overhaul and be carried out to clean the system to inhibit
damage to the transmission.
The need to change the transmission filter after 100 hours of
operation after a major overhaul is not required PROVIDED
the transmission failure was not caused by oil cooler failure
and procedure of installing a 75 micron service strainer is
carried out.
Service Procedure
1. During overhaul, clean the transmission of as much
debris as possible and install a 75 micron service
suction strainer A and gasket B, Figure 7-68.
P/N 1902923 - 75 micron Service Suction Strainer
P/N 1001435 - Gasket
D
C
a1656
2. If there is a significant amount of debris it is
recommended that the oil cooler and the transmission
cooling lines be cleaned.
a. After the transmission has been installed in the
crane, fill the transmission with recommended fluid.
The transmission should be overfilled for initial start-
up.
b. Disconnect the oil feed line E, Figure 7-69 and place
it in a suitable container. Run the engine at idle and
drain oil into the c ontai ner. This will i nhibit
GROVE
B
A
FIGURE 7-68
Published 04/07/2015 Control # 569-00
TRANSMISSION AND TORQUE CONVERTER
c o n t a m i n a t e d o i l b e i n g p u m p e d i n t o t h e
transmission. Keep the transmission full of oil at all
times.
c. Stop the engine and reconnect the oil feed line.
Check the oil level and fill if necessary. Do not
overfill.
3. Run the engine until the transmission is at working
temperature and carry out functional checks.
4. Remove the service suction strainer A, Figure 7-68 and
drain the oil through the strainer, not the drain plug C.
The oil MUST NOT be reused as it will be contaminated.
Clean the service suction strainer and magnet and retain
for future use.
5. Install the production suction strainer (200 micron)
strainer and a new pressure filter D, Figure 7-68.
6. The pressure filter should also be changed after a
further 100 hours of operation, if the cause of the
transmission failure was oil cooler failure.
7. Replenish the oil system with clean recommended
transmission fluid.
a2350
7
FIGURE 7-69
7-49