2006/05/15 Caterpillar

Engine:

G3516C (S/N: GSB1-UP; TJB1-UP; TJC1-UP; GZZ1-UP)

G3516E (S/N: GAS1-UP)

G3520B (S/N: CWD1-UP; GZP1-UP; GET1-UP; BGW1-UP)

G3520C (S/N: MAD1-UP; GZJ1-UP; GZK1-UP; GZL1-UP; GZN1-UP; B9P1-UP; HAT1-UP; CWW1-UP; CWY1-UP)

G3520E (S/N: GZG1-UP)

Engine News SEBD9398, 15 May 2006, "An Improved Jacket Water Pump is Used". The original article has been revised because the pump was canceled and replaced and the pump is not exclusive to engines rated at 1500 rpm. The title is also slightly different.

Description of Change: An improved water pump has been introduced for G3516 and G3520 Engines. The following improvements have been made to the water pump:

• The material for the impeller shaft helps prevent corrosion.

• The water seal is a one-piece unit.

• A more rugged design of the pump housing

• Improved harmonics for the impeller and for the impeller shaft

Adaptable To: The 258-8725 Water Pump Gp is used instead of the former 235-4535 Water Pump Gp. The new water pump groups are used within the water pump groups that are listed in the following tables. The improved pump is adaptable to the engines that are listed above. Serial number effectivity is listed in the tables below.

Table 1

209-8232 Water Pump Gp (Current)
S/N:CWW00302-UP	S/N:CWY00222-UP	S/N:B9P00215-UP	S/N:MAD00202-UP
S/N:HAT00212-UP	S/N:GZN00331-UP	S/N:GZL00141-UP	S/N:GZZ00186-UP
S/N:GSB00114-UP	S/N:GZK00167-UP	S/N:GZJ00222-UP	S/N:GZG00112-UP

Table 2

252-7846 Water Pump Gp (Canceled)
S/N:MAD00202-UP	S/N:HAT00211-UP	S/N:GZK00167-UP	S/N:GZJ00222-UP

Table 3

206-0632 Water Pump Gp (Current)
S/N:BGW00131-UP	S/N:GET00115-UP	S/N:CWD00240-UP	S/N:GZP00119-UP

Table 4

253-0585 Water Pump Gp (Current)
S/N:DKR00104-UP	S/N:GZZ00186-UP	S/N:GAS00139-UP

Table 5

239-2388 Water Pump Gp

S/N:GET00115-UP

The most recent history of the pumps that are used within the water pump groups is listed in Table 6.

Note: The form, fit, and function of the 258-8725 Water Pump Gp is the same as the 349-6213 Water Pump Gp. Use of all 258-8725 Water Pump Groups that remain in inventory is recommended.

Table 6

History of the Water Pump
Status	Canceled and replaced	Canceled and replaced	Serviceable	Service Replacement
Part	235-4535 Water Pump Gp	258-8725 Water Pump Gp	349-6213 Water Pump Gp	20R-0505 Water Pump Gp