FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * ARMSTRONG RONALD E   2. Issuer Name and Ticker or Trading Symbol PACCAR INC [PCAR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President (Last) (First) (Middle) 777 106TH AVENUE NE 3. Date of Earliest Transaction (Month/Day/Year) 07/26/2013 (Street) BELLEVUE, WA 98004 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price COMMON STOCK 07/26/2013   M   12,790 A $ 25.31 55,428 D   COMMON STOCK 07/26/2013   S   12,790 D $ 55.7754 42,638 D   COMMON STOCK (SIP) (1)               17,201.868 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

STOCK OPTION (2)

$ 25.31

07/26/2013

M

12,790

01/01/2007

01/15/2014

COMMON STOCK

12,790

(2)

0

D

STOCK OPTION (2)

$ 32.11

01/01/2008

01/20/2015

COMMON STOCK

12,046

12,046

D

STOCK OPTION (2)

$ 32.23

01/01/2009

01/26/2016

COMMON STOCK

13,675

13,675

D

STOCK OPTION (2)

$ 44.56

01/01/2010

01/31/2017

COMMON STOCK

13,704

13,704

D

STOCK OPTION (2)

$ 45.74

01/01/2011

01/30/2018

COMMON STOCK

15,188

15,188

D

STOCK OPTION (2)

$ 30.81

01/01/2012

01/30/2019

COMMON STOCK

28,024

28,024

D

STOCK OPTION (2)

$ 36.12

01/01/2013

02/02/2020

COMMON STOCK

21,758

21,758

D

STOCK OPTION (2)

$ 50.5

01/01/2014

02/03/2021

COMMON STOCK

31,380

31,380

D

STOCK OPTION (2)

$ 43.24

01/01/2015

02/02/2022

COMMON STOCK

49,102

49,102

D

STOCK OPTION (2)

$ 47.81

01/01/2016

02/06/2023

COMMON STOCK

43,672

43,672

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ARMSTRONG RONALD E 777 106TH AVENUE NE BELLEVUE, WA 98004			President

Signatures

Ronald E. Armstrong		07/29/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Shares held in PACCAR Savings Investment Plan (SIP).
(2)	Option to buy awarded under PACCAR Long Term Incentive Plan.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

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