DRESSTA TD-25M EXTRA, Service Manual

Page: 559 / 595

TRACKS OR WHEELS
SECTION 15
Page 13
DRESSTA TD-25M EXTRA
TRACK CHAIN
Fig. 15.16. Pin Installation
2. Bolster
4. Guide Plate
6. Connecting Rod Nut 7. Hitch Pin
9. Pin Receiver
13. Ram Cap 14. Adapter Plug
15. Ram Cap Bolt
18. Pilot Pin
3. Remove bushing receiver (12, Fig. 15.14) from bolster. Install pin receiver (9) to bolster (2).
4. Position pilot pin (18) in track assembly so that pilot pin fits freely. Position new track pin
in guide plate (4) with index mark (1, Fig. 15.6) facing toward track shoe mounting surface
cross-drilled hole (3, Fig. 15.6) will be facing away from track shoe mounting. Apply
LOCTITE #680 in bore of link and on OD of track pin. Align track pin on adapter plug (14), guide
plate (4) and pilot pin (18) and press track pin in until it bottoms.
5. Repeat Steps 1 through 4 for other track pin.
6. For initial check of the seal pressurize joint with 350 [kPa] of air pressure. After pressure holds
for 10 [sec], place a special purpose rubber plug in end of pin of assembled joint using mounting
tool (refer to SERVICE/SPECIAL TOOLS).Tap it in until it is flush or slightly below chamber of
pin hole.
7. For final check of the seal use seal tester or vacuum pump (refer to SERVICE/ SPECIAL TOOLS).
Insert lubricator nozzle of tool through plug. Pull a vacuum of 70 ± 5 [kPa] and hold for 10 [sec]. In
event that vacuum cannot by held, either seal to bushing face or chain pin to link bore mating
surfaces are leaking. To determine which side is leaking, pressurize joint with 350 [kPa]
of air pressure, apply soap solution to both seal areas and check for soap bubbles. After finding which
side is leaking, joint must be rebuilt. If vacuum holds for 10 [sec], fill evacuated pin with oil under
100 to 170 [kPa] to obtain required oil level 54 to 74 [mm] below the end face of the pin. Use oil
recommended in OPERATOR’S MANUAL with 0.02% red dye. Remove lubricator. Remove
special purpose plug and install proper plug (10, Fig. 15.5) using mounting tool (refer to
SERVICE /SPECIAL TOOLS). Tap it in until it is 3 [mm] below chamfer edge of pin hole. After
installing plug punch the pin hole around its chamfer edge using header (refer to
SERVICE /SPECIAL TOOLS) to prevent plug from escaping.
NOTE: Once joint is lubricated, there is no way of checking for leaks.