SCREW 1783338 - Caterpillar

TECHNICAL INFORMATION BULLETIN JUNE 09, 2004
EXCAVATORS 330C (MCA, JAB, JCD, GAG, BTM), 330C L (CYA, HAA, KDD, RBH, JNK, MKM, CAP, DKY, GKX), 330C LN (CGZ), 330C MH (D3C), 330C FMHW (B1K, B2L, B4N), 330C FMST (B3M) EXCAVATORS
Component Code(s) 5057, 1374SUBJECT: IMPROVED HOSES PREVENT OIL LEAKS AT THE HYDRAULIC OIL
COOLER ON CERTAIN EXCAVATORS
PROBLEM:
Oil leaks may occur from the hoses that join the hydraulic oil cooler and the return and filter lines at the hydraulic oil cooler.
SOLUTION:
If the hoses that join the hydraulic oil cooler and the return and filter lines leak, replace the hoses. Use the procedure that follows for replacement of the hoses.
The length of the new hoses is increased. A new support correctly positions the oil cooler pipe after the installation of the longer hoses. Additional hose clamps are also added to the new hose in order to prevent oil leaks. The effectivity of the improved hoses is listed in Table 1.
Effectivity Of The New Hoses
Model Effectivity
330C JAB506-Up, GAG263-Up, and BTM176-Up
330C L HAA306-Up, KDD369-Up, and RBH207-UpTable 1.
Procedure For The Replacement Of The Hoses In The Oil Cooler
Refer to the Service Manual that is appropriate for your machine.
Required Parts For 330C Excavators1
Qty New Part Number Description Former Part Number
2 227-0428 Hose 221-4893
4 144-0367 Hose Clamp -
1 227-0471 Support 212-5458
Required Parts For 330C L (DKY) Excavators
2 227-0428 Hose 221-4872
221-4893
4 144-0367 Hose Clamp -
1 227-0471 Support 212-5458Table 2.
1All 330C Excavators Except 330C L (DKY) Excavators
Procure the required parts that are listed in Table 2.
Illustration 1. Return And Filter Lines Group
(1) 144-0367 Hose Clamp
(2) 8T-4192 Bolt
(3) 8T-4223 Hard Washer
(4) 221-4893 Hose
(5) 212-5458 Support
(6) 7Y-5247 U-Bolt
(7) 8T-4121 Hard Washer
(8) 096-4883 Locknut
Loosen the two hose clamps (1) on the former hose (4) at the INLET side of the oil cooler. Remove the former hose. Discard the hose and retain the hose clamps. Refer to Illustration 1.
330C L (DKY) Excavators are configured with a 221-4872 Hose at the INLET side of the oil cooler.
Loosen the two hose clamps (1) on the former hose (4) at the OUTLET side of the oil cooler. Remove the former hose. Discard the hose and retain the hose clamps.
Loosen and remove the two bolts (2) and hard washers (3), the U-bolt (6), two locknuts (8), and two hard washers (7) from the former support (5). Discard the former support. Retain the two bolts, U-bolt, two locknuts, and four hard washers.
Illustration 2. Return And Filter Lines Group
(1) 144-0367 Hose Clamp (typical in four places)
(2) 8T-4192 Bolt
(3) 8T-4223 Hard Washer
(6) 7Y-5247 U-Bolt
(7) 8T-4121 Hard Washer
(8) 096-4883 Locknut
(9) 227-0428 Hose
(10) 227-0471 Support
Install a new hose (9) on the INLET side of the hydraulic oil cooler. Use the two hose clamps (1) retained in Step 2 and two new hose clamps (1). Tighten the four hose clamps to a torque of 7.5 ? 0.5 N?m (5.5 ? 0.4 lb ft). Refer to Illustration 2.
Install a new hose (9) on the OUTLET side of the hydraulic oil cooler. Use the two hose clamps (1) retained