105681-0820 ZEXEL 9 420 615 521 BOSCH AUTOM. ADVANCE MECHANISM 9420615521 1056810820

Table 1
Features Benefits
All engineering changes and updates included Improved reliability and performance
Worldwide availability through the Cat® Parts Distribution System Customer access regardless of location
Off the shelf reliability Downtime reduced through exchanged product
Same as new Caterpillar warranty Consistent support
Illustration 1 g06211468
(1) Rocker arm with MEUI-A hardware
(2) Rocker arm with MEUI-C hardware
Table 2
MEUI-A Rocker MEUI-C Rocker
258-8721 Button 192-4151 Button
274-4492 Arm Adjustment Screw 196-5069 Arm Adjustment Screw
8L-2777 O-Ring Seal 061-8639 O-Ring Seal
Table 3
Reman Part Number New Part Number Engine Serial Number Prefixes
20R-3319 437-3881 115, 127, 132, 137, 173, 174, 175, 2A3, 3LW, 5DS, 7CZ, 8AZ, 9NN, 9YP, AL6, AN2, AR2, AR3, ASW, AT4, AZW, B2C, B3G, BEM, BFM, BGA, BXS, C1G, C2T, C4G, C5E, C5L, C6C, CAH, CCB, CE5, CKH, CWJ, DCT, DDS, DGK, DGL, DKE, DSJ, DWB, E1Y, GB3, GBM, GDS, GEN, GES, GRS, GSZ, GTB, HAZ, J2K, JAZ, JCF, JDA, JE9, JHL, JKG, JKS, JNZ, JSJ, K7C, KJT, KNM, KRA, L8D, LNA, LWR, LXJ, LXK, M1W, M1Y, M1Z, M7W, MCW, MDP, MED, MG2, MPE, MXS, N5F, NAW, NAY, NB2, NEW, NKL, NRC, NXS, P8B, PBL, PCY, PCZ, PEC, PEE, PEF, PEJ, PEK, PET, PHT, PHW, PKG, PKY, PKZ, R8W, RAM, RET, RGX, RLA, RNE, RNF, RNR, RNX, RNY, RNZ, RPM, RSD, RTK, S1P, SDN, SDP, SMP, SNW, SSM, STG, SXC, T3T, T4A, TG7, THS, TLD, TNA, TWM, W1A, WJB, WJY, WKB, X5M, XMJ, ZAG, ZKA, ZKB, ZP3, XP5
20R-3322 437-3862 176, 188, 1LW, 1MM, 2WS, 4AS, 5EK, 6BR, 6TB, 6TG, 6TS, 7T2, 9BZ, 9WR, B5R, BDN, BG4, BP2, BS9, C1J, C2A, C3G, C5H, CBX, CJP, CYN, CYY, DPG, DTP, DZE, EGH, EJG, EKW, EPE, F5C, F8N, G4C, GEX, GHJ, GJE, JAS, JDK, JDY, JEP, JKX, JLE, JRE, JWH, JZB, KCM, KEM, L8B, LDN, LET, LNB, LZA, LZB, MBN, MEP, MGS, MMB, N1C, N1D, NAP, NAX, NBB, NKK, PBN, PDM, PGN, PLE, RKS, RNC, RRC, RT2, RWS, SAY, SSW, STD, STM, SWE, T2P, T2R, TRB, WJA, WJH, WJW, WRH, X4R, XMK, Z2C, ZAY